Youcan is a slightly faster variant of Two Can. Like Two Can, it can perform powerful wave attacks, but it also has an extremely tough barrier (266,000 HP!). Barrier Breaker cats are almost mandatory to defeat this enemy. Aside from that, strategies to defeat Youcan are similar to what would be used against Two Can.
Strategy
Despite Youcan's obscenely strong barrier, there are a few Ubers and a Legend that are capable of breaking through with sheer attack power alone. Jizo's Moving Castle can destroy Youcan's Barrier in one hit if it's at least level 26 and if the player has all Heaven's Fruit Treasures, however Jizo's Mega-Castle must be level 33. Hallowindy can break the barrier at level 37 with all anti-Alien treasures. Lufalan Pasalan can break the barrier at level 33 if he performs a Critical Hit. Colossal Benkei can break the barrier at level 25 with all anti-Angel treasures. Catman can break the barrier at level 50 with all anti-Alien or anti-Angel treasures.
Fencer Cat's 100% chance of breaking barriers can also help greatly in stages with Youcan. Li'l Macho Leg Cat only has a 30% chance to break barriers, but their 30% chance to knockback Aliens can repeatedly interrupt Youcan's long attack animation when stacked.
Octopus Cat, Cat Machine Mk 3, and Eva Unit-00 can be used to block Youcan's waves. The latter two are additionally resistant to Youcan's attacks and have massive health pools, while Eva Unit-00 stands outside of their attack range.
Dictionary
English Version
An extra-confident bird named by his parents who wanted him to always believe in himself. His arrogance is so extreme that it consumed his home dimension and drove him to this one.
*In each stage, there is strength magnification, the value of health and attack power varies due to this value.
*Time between attacks is the time of the attack from the motion end until the next attack motion start
Trivia
This enemy's name is a play on words 'you can'. This is further supported by his description saying that this enemy is over-confident, most likely from others saying "you can!"
This enemy has the same barrier HP (266k) as UltraBaaBaa.
These two enemies have the highest barrier HP.
In the Korean version of The Battle Cats, his name is 'dehmongyee', (not correctly spelled) known as having big hopes and dreams.