Elemental Pixies
Rares
Super Rares
Ubers and Legend Rares
Yamii
Yamii is a bad spammable anti-Alien/Aku CC unit in First Form, and a poor anti-Alien/Aku debuffer/Tanker in Evolved Form. In First Form, Yamii has a 30% chance to weaken Alien and Aku enemies to 50% attack for 2s with each of his three multihit attacks in a 6.6s attack cycle. This is backed up by 21k HP and 2 KBs, 900 DPS at 150 range, 15s recharge, and 990 cost. In Evolved Form, Yaminoir has a longer 98s cooldown in exchange for higher stats; 52k base HP with 2 KBs, 3800 DPS at 340 range, 10 Speed and 2850 cost. Yaminoir also improves his Weaken ability to be guaranteed and last 3s on each hit, and like all other Pixies, he also gains Resistance to Aliens as well as a guaranteed Barrier Break in Evolved Form. Both forms have Warp Immunity.
Yamii's very low cooldown aids in stacking large numbers of him on the field to provide a constant stream of Weaken procs. In Evolved Form, Yaminoir has 250k effective HP against Aliens (with COTC treasure) and 200k against Akus. His multihit enhances his Weaken uptime to 66% (80% vs Aliens with treasure), further enhancing his durability. His quick multihit attacks with guaranteed barrier break also quickly remove Star Alien barriers. He can weaken hard-pushing crowds of Aku Gories and hard-hitting Condemned Pengs as one of few available options to tighten up your defenses against them.
Yamii has very low range, a mere 150, outranging only three Aku enemies (Doge, Snache, Cerberus Kids) and four regular Aliens (Shibalien, Kroxo, Nimoy, Cyberhorn), all of which except perhaps Nimoy and Cyberhorn are even meaningful to weaken, greatly limiting the number of situations where you would use this form. In his few use cases, Rare and Super Rare Alien CC options are always preferable. Yaminoir obtains a more respectable range but suffers from very low base stats and speed for a midrange tank, even in his target traits, failing to work as a tank and not really having meaningful DPS even then. As a Barrier Breaker he offers little that Kitty of Liberty does not. His mediocre weaken uptime makes his CC unimpressive at best, again failing to justify using over Rare/Super Rare control units for Aliens, and does not work at all against Shielded Akus. This, combined with his range, means his only relevant targets in that trait are Aku Gory and Condemned Peng, with no answer to the harder to handle Akus. Even then, the Level Seal effect in Aku Realms means your units are often too low levelled to even meaningfully endure weakened hits from these enemies.
In conclusion, Yamii's low quality ability and stats in both forms render him next to useless in all specialist and generalist domains. In the few cases he is viable against Aliens, non-Uber options do the job better. He can nominally counter unshielded Akus but this is of limited effectiveness. Overall, certainly the worst pixie and desperately in need of a true form.
Gravi
Gravi's True Form, Gravolodon, is a good melee wave attacker with Resistance to Aliens, Barrier Breaker, Warp Blocker and Wave Immunity. He creates a level 4 Wave that extends to 933 range and does 30k Damage, and has 5100 base DPS at 230 range, 120k base HP with 2 KBs and 8 Speed. Lastly, he has 3870 cost and 78 second Cooldown. Stats in Evolved Form are considerably worse and not worth using. First Form is a more spammable variant which is not very useful either. True Form is essential for most uses.
Gravolodon works well as a Tanker and as a wave attacker. His high effective HP (600k with full COTC treasure) and Warp Blocker ability enable him to comfortably tank both Aliens and Star Aliens. Besides that, his Wave ability boosts his effective DPS up to as much as 10.3k against bulky enemies, and he can hence deal some serious damage before dying even outside of his Alien specialisation. He is also usable as a Sniper as his wave alone has around 5k DPS and is able to hit nearly every common backliner in the game, even Nyandam and Sunfish Jones variants. His wave also elevates his Barrier Breaker ability to be effective at clearing both front and backline barriers at once. Wave Immunity is generally not too useful given his range class but is very effective against Alien wavers such as in Ajillo Highlands.
Gravolodon does not perform well in tanking general enemies or in mixed trait stages where his HP at low range will not last long. Besides that, he has a somewhat low damage per hit, so he needs to survive long enough to deliver multiple strikes in order to show his worth, unlike other Tankers who can instantly deliver ~100k Damage with their first hit and then happily die, having done their job. Lastly, he has longer than average cooldown compared to other melee units, so he doesn't spend all that much time on the field outside of Alien stages.
In conclusion, Gravolodon works well, as a general wave attacker, Barrier Breaker and anti-Alien Tanker in True Form. However, his low damage per hit and range prevent him from being as good as certain competitors in these classes.
Voli
Voli is a spammable (16.2s CD) anti-Alien CC unit with a 50% chance to proc Freeze for 3 seconds in First Form, 19k HP with 3 KBs, 320 range, 2.2k DPS and Warp Immunity. In True Form, Gigavolta becomes less spammable (83s CD) but gains a guaranteed 3.67s Freeze proc, Resistance to Aliens and Barrier Breaker. This makes him an excellent anti-Alien unit. Additionally, Gigavolta has 54k base HP with 3 KBs, 5700 DPS, 370 range, and 20 Speed.
Although Voli is more used in other forms, his First Form still works quite well. If paired with Seafarer Cat, it is easy to achieve permafreeze on Alien enemies quickly. In True Form, Gigavolta is a Midranger with ~60% Freeze proc uptime (or nearly 75% uptime with treasures). With his >215k effective HP (or 272k with treasures), low cost and CD, it's easy to always have him on the field, and permafreeze with just two unsynced Gigavoltas. Barrier Breaker helps a lot to let your units push too. Gigavolta still works decently well on mixed Alien + non-Alien stages, but more support is needed to prevent other traited enemies from reaching him.
The only weakness of Gigavolta against Aliens is that he has a somewhat low range but even then, it doesn't matter most of the time on pure Alien stages since Gigavolta has the effective HP to tank a few hits from Backliners and then walk up to freeze them. Outside of Aliens, he simply lacks the stats to be effective as a midrange attacker and is outclassed by almost any generalist in his range class, and even many safer-range backliners.
In conclusion, Voli is an excellent anti-Alien CC Uber that is useful in a lot of Alien stages throughout the game. His usage as a midranger isn't really recommended outside of the very early game, due to simple poor stats. He relies entirely on his abilities against Aliens for value.
Aer
Aer isn’t very useful in First Form, but in Evolved/True Form, Aervanta is a decent Barrier Breaker unit with a combination of guaranteed chance to break barriers and Long Distance (LD) attack from 275 to 650 range while standing at 375. Base stats include 4600 DPS with a 4.7s attack frequency, 58k base HP with 2 KBs, and a 88s CD. Like all other Pixies, Aervanta also gain Resistance towards Aliens in Evolved/True Form and Warp Immunity in all forms. Talents add Dodge and Weaken abilities to extend Aer’s lifetime, but are not extremely useful.
Aervanta is used as a Barrier Breaker unit. With LD attack and 275 piercing range, his attack can easily reach and break backliner barriers. Besides, Aervanta has a fairly quick attack frequency, which greatly amplifies his efficiency in breaking barriers. Aside from breaking barriers, Aervanta still has decent LD DPS that helps to cripple and kill Starred Alien backliners (as most of them tend to have lower HP) and substantial effective HP close to 300k. As for his general usage, Aervanta still works decently as an LD unit if you don't have better choices. With his quick recharge, you can easily send multiple Aervantas in a battle.
The main flaw of Aervanta is that he is easily replaced by Golfer Cat and Kitty of Liberty. You can easily break frontline barriers with Liberty, and use Golfer for the backline. Besides, Aervanta has a low survivability due to below average standing range for a Sniper, and only one chance to reposition if enemies reach him, thus making his general usage rather unsatisfactory.
In conclusion, Aervanta is a Barrier Breaker that can easily hit backline barriers, but his role is replaceable most of the time by Super Rares (Golfer and Liberty). His usage generally as an LD unit is still decent, but having a lower range and less reposition chances greatly reduce his survivability.
Mizli
Mizli isn't that useful in First Form, but in its True Form, Mizuririn is a decent anti-Alien Crowd Control Uber with a 100% chance to proc Knockback and Slow against Aliens for 4 seconds (5 seconds with full treasures), Resistance to Aliens, and a guaranteed Barrier Breaker and Warp Immunity for Starred Alien stages. In addition, TF gives a ~20% increase to base stats to reach 51k base HP with 4 KBs, and 5000 DPS at 400 range with 85s Cooldown but is not necessarily needed for her to perform well in her CC role. She sounds useful on paper but, in the end, won't be one of your main anti-Aliens.
Mizuririn is an excellent Alien staller on Alien stages with no backliners. Without backliners, she can constantly push every Alien enemy back, thus keeping all your attackers safe from all harm. Mizuririn also synergizes well with Sniper units. This is due to how in some stages, Alien backliners get paired with fast rushing or tanky frontliners of different ranges that Seafarer and general units can't handle well. Mizuririn is able to control them, allowing your Sniper to counter the backliners. In these cases, Mizuririn can also act as a secondary CC, if enemies ever manage to push past your stack of Seafarers and go near your Sniper Ubers. Another usage of Mizuririn is on stages with a mix of frontliner traits; where she only knockbacks the Alien frontline to reduce push while still keeping the non-Aliens in the front. This greatly reduces stress on your meatshields, making enemies push less thus keeping Mizli safe before all Frontliner enemies die out. This makes Mizli a valuable unit to have in most of CotC. Her 200k effective HP also means she’s quite hard to kill, and like other Pixies can be used well enough as a Barrier Breaker too.
The biggest flaw of Mizuririn is that she causes "Mizli Syndrome" which is where she knocks the frontline Aliens back which causes other units to rush forward and push. Since most Alien stages include backliners, the backliners will kill your stack after rushing forward; so Mizuririn often causes more harm than good. For the usage of Mizuririn as a general backline damager, she doesn't perform well due to low range as a Backliner which makes her more vulnerable as enemies have to push much less to reach her.
In conclusion, Mizli is an anti-Alien Uber that causes more harm than good most of the time, but can carry on certain stages. While she might not be as good as other anti-Alien Ubers due to her abilities, she isn't useless and is an ok unit to have from time to time.
Bora
Bora is a decent spammable anti-Alien unit in First Form, and an excellent midrange Alien Nuker in Evolved and True Form. In First Form, Bora has 19k HP, 2300 base DPS, 330 range and 17s recharge. True Form, Bazibastra has longer cooldown in exchange for higher stats; 54k base HP with 3 KBs, 5200 base DPS, 390 range, 81s recharge, and 8 Speed. All forms have Massive Damage to Aliens, a 3s foreswing, 3 KBs, and Warp Immunity, and like all other Pixies, he also gains Resistance to Aliens as well as a guaranteed Barrier Break in Evolved/True Form. He can unlock a Strengthen talent which adds 50% attack when his HP is lower than 33%.
Even though Bora is more used in other forms, his First Form still works well as a semi-spammable anti Alien. He is essentially a longer recharge but higher survivability Chill Cat, and is a great asset in CotC cost restriction stages. In True Form, Bazibastra becomes one of the best anti-Alien Ubers in the game. He has 270k effective HP and 21k effective DPS against Aliens (with full treasures), allowing him to survive for a long time on the field while being able to cripple all Alien enemies with his massive damage output. Resistance to Aliens enables Bazi to use up all of his 3 KBs to reposition and survive almost indefinitely, while also allowing him to walk into backline Aliens and kill them easily. Besides, Bazi has a lower cost and shorter recharge compared to most Ubers, so it is easy to send out multiple Bazis in a battle. Having guaranteed Barrier Break and Warp Immunity also helps a lot against Starred Alien enemies. If his Strengthen talent is unlocked, he can produce an insane ~31.5k effective DPS while on his last KB, and still have nearly 100k HP left to ensure he doesn’t die before being able to make use of it.
The only weakness of Bazi against Aliens is his long foreswing causing some misses, though that doesn't matter most of the time given how much he overpowers them. Other than that, Bazi just has below average stats against non-Aliens. His awkward range makes him unusable as a Backliner, but with too little general DPS to be a successful Midranger instead. He doesn't perform well on mixed-trait stages with fast pushing or backliner non-Alien enemies too, as this makes Bazi die before contributing much to the battle.
In conclusion, Bora is one of the best anti-Alien Ubers in the game, with high effective HP to take a lot of hits, high effective DPS to cripple Alien enemies, great supplementary abilities and a low cost First Form for alternate uses like cost restrictions. However, with low range and below average base DPS, he functions as a subpar general Nuker outside of Alien enemies.
Lumina
Luminalia is an extremely good anti-Alien Tanker with one of the highest effective HPs in the game, due to her high 136k base Health, 100% Weaken proc that lasts 5 to 6s depending on treasures, and Insane Resistance. She also comes with 375 range, 6900 DPS and 30 Speed, along with 3 KBs, 75s CD and 3675 cost. She also has 100% Barrier Breaker, Slow Immunity and Warp Immunity. Her first form is a lot less useful and will at most see some use in Cost Restricted CotC stages.
With her high base health, a reliable perma-Weaken effect, and Insane Resistance, her effective HP of 1.9M makes her essentially invincible against almost all Aliens. Thanks to this and her short respawn time and low cost, she will probably not die until long after you have already sent out another one, making her quite literally a free win on all but a few Alien stages. Warp Immunty and her fast attack rate paired with Barrier Breaker mean Star Aliens are also helpless against her. Luminalia is clearly an unparalleled specialist, however, she doesn't stop there and also has all the qualities you want in a general midrange attacker; high base HP and speed to infiltrate blindspots and not get juggled, decent DPS on a fast attack cycle so she rarely dies before making a dent in the enemy, and a fast enough Cooldown that you can afford to lose her. With Slow Immunity too, this great stat build surprisingly even lets her counter Professor A.
While Luminalia's 375 range allows her to be used as a midrange Rusher, it can hinder her performance as a frontline Tanker. She will act more as a second line of defense. Furthermore, while she can tank some hits from non-Aliens, she does not do great when there are many high magnification enemies of different traits. She can also have some trouble fending off extremely high magnification Aliens, especially those that are meant to be dealt with meatshields, such as end game Star Pengs. While her short backswing can be covered with her tankiness, she can be somewhat lacking compared to some other midrange Rushers in terms of offensive abilities, KB count, and DPS.
Despite the weaknesses mentioned above, Luminalia is a solid Tanker to own which will last quite long, only falling off as a Tanker in end game, and can also be used in many rush strats or as a midrange attacker if you lack those. Owning her will no doubt be a major carry in ItF as well as most of CotC, and even some late game Alien stages.