Dragon Ball Heroes vs Kingdom Hearts

Connection:

Both are spiky-haired teenage heroes that travel across the multiverse and fight off against the evil that seek to change history or destroy it (The Time Breakers and the Heartless/Organization XIII respectively)

Both are capable of summoning multiple characters to their aid (cards and summons respectively) and are related to other heroes (Goku is Beat's ancestor and Ventus is a part of Sora's heart)

Both are capable of powerful transformations (Ultra Instinct and the Ultimate/Final Form respectively), grow wings with exponential power (Tokitoki's power and the One Heart) and are capable of wielding powerful key-themed weapons (Key Sword and Keyblade respectively)

Both are also voiced by the same Japanese voice actor, Miyu Irino, and their outfits have a red base