CHAOS BALL

(Note: i am excluding anything that's too similar to Dragon Emerald but isn't important to warrant a demand for it)

Goku + Sonic = Son Nick/Sonakak

Vegeta + Shadow = Vegdow

Trunks + Silver = Silvunks

Krillin + Knuckles = Krackles

Yamcha + Big = Yag

Tien + Tails = Tiels

Piccolo + Vector = Viccotor

Frieza + Eggman = Friezman

Cell + Metal Sonic = Metal Cell

Sage + Buu = Buge

Broly + Infinite = Brawnfinite