Similar to his SP variant SP SSJ Trunks YEL, this Fighter is a Ranged Type that Synergizes very well with any Goten variant.
The fact that he was farmable to 7 stars not only sets him apart from most other Extreme Fighters stats-wise but Boosts his color-locked Z-Ability to very high levels.
While not viable for the core, he makes his presence known through bench Support of Blue Fighters.
Card Drawing Main Ability
Card drawing is one of the more powerful effects in the game. When EX Kid Trunks BLU uses his Main Ability, he not only increases his Blast Damage inflicted for 30 timer counts but gets a Blast Arts Card as well.
This keeps the pressure on Enemy Fighters and greatly Boosts his Blast Attack for quite a long time.
Awful Ki Recovery Speed
EX Kid Trunks BLU definitely has a hard time getting enough Ki to do achieve longer Combos. His Ki Recovery Speed ranks among some of the lowest in the entire game and can only be patched up ever so slightly with Equipment.
While his Blast Attack stat is great, his Strike Attack ranks among some of the worst. This, in turn, creates a few problems when building a Team, since Hybrid Saiyan Teams are Melee based and tend to carry many Strike Arts Cards.
EX Kid Trunks BLU can fit into a standard Hybrid Saiyan Team's bench since they have a few strong Blue Fighters now, but he definitely shouldn't be put in the core unless absolutely necessary.
He's fantastic bench Support, but definitely not strong enough to make the core.