Compared to Uber Rare units, Bahamut Cat in his first two forms falls quite short. However, with the fact that he's a free early game unit rather than an Uber Rare, Bahamut Cat is recommended for most stages in early game.
Unfortunately, Valkyrie Cat's True Form doesn't improve her stats enough to be relevant again outside of 4-Crown stages, which she is outclassed by due to Bahamut Cat and Ururun Cat existing, both of whom are much easier to stack and have higher range than her, not even mentioning their True Forms.
Bahamut Cat is one of the strongest non-uber cats in the game and is a MUST-HAVE in Legend Stages. His extraordinarily high attack power and long-range are sure to destroy anything less than a powerful boss enemy.
1 Crazed Bahamut Cat/Bahamut Cat
I think Awakend Bahamut Cat was meant to be the best cat in the game. I mean you get him after beating the last chapter the most op enemy type Bun Bun he is expensive high DPS, health, and speed in true form.
鬼にゃんま (Oni Nyan-Ma, Oni Cat-Devil)
Deals massive damage in a single hit.
Evangelist Cat has a longer freeze duration, faster movement speed, and a very cheap production cost, but otherwise behaves in a nearly identical manner.
A tier: Ultra souls and almighties are easily the best non-fest banners in the game.
Express Cat (Super Rare Cat)
Bahamut perished during the twilight of the Third Astral Era while defending Meracydia from an invasion by the the reborn Allagan Emperor Xande who set about his campaign making a covenant with the Cloud of Darkness.
Calamity Bahamut was so insanely strong because he was being fueled by a moon-sized aether power plant combined with the desperate pleas for salvation from thousands (if not hundreds of thousands) of imprisoned dragons, for thousands of years.
Awakened Bahamut Cat will die often due to his short range typical of Rusher-class units and his low health. However, he can be put to great use against durable enemies with slow attack rates or low range, such as Bore and Sunfish Jones, provided if you support him sufficiently.
Valkyrie, Bahamut, Ururun, Nyandam, Mina, Musashi, Mecha Bun and the Heavenly Tower legends are all capped at 30 until you beat An Ancient Curse, which when you beat it you can use Catseyes to get them to level 40, however they cannot go past it.
Fun for all ages, anyone (and their cat too!) can enjoy the "Battle Cats"!
Nekoluga is an Uber Rare Cat that can be unlocked by playing the Rare Cat Capsule during the Tales of the Nekoluga event. True Form added in Version 5.0 greatly increases his attack power and gives him the ability to freeze any non-Metal enemy.
THE SLOTH is one of the slowest enemy units in the game in terms of speed and attack rate, but he can inflict upwards of 8,000 damage on multiple Cat Units.
Cheap and expendable, Boogie Cat can be summoned in masses to take hits in place of other, more important units. This meatshield role is quite valuable, if not for the wide selection of Cats able to perform this role much better due to faster speed.
Easiest was Crazed Fish Cat. Harder was Crazed Tank or Crazed Titan.
This is a fairly simple yet challenging level; the best way to win is by not using meatshields at all but instead fight with only ranged attackers so a Crazed Gross doesn't hit a meatshield and trigger a Wave Attack.
Her range is lower than Cheerleader Cat, but still high enough to outrange every single common Metal enemy, earning her a spot in any Anti-Metal lineup. Additionally, her attack rate is fast enough that as long as she is properly protected, she can deal lethal strikes to Metal enemies consistently.