Sonic adventure sprite : r/sonicadventure2

Dreamcast - Sonic Adventure 2 - Sonic's Theme - The Spriters Resource

The Spriters Resource - Full Sheet View - Sonic Adventure 2: Battle - Theme Icons

The Textures Resource - Full Texture View - Sonic Adventure 2: Battle - Route 101 / 280 & Kart Race

Favourite Sonic model/sprite? : r/SonicTheHedgehog

Pixilart - SONIC ADVENTURE SPRITE 2 by 4ME4

The Textures Resource - Full Texture View - Sonic Adventure 2: Battle - City Escape

Proto:Sonic Adventure 2 (Dreamcast)/May 7, 2001 Prototype/Debug Mode - The Cutting Room Floor

Dreamcast - Sonic Adventure 2 - Egg Walker - The Textures Resource

DS - Sonic Rush Adventure - Cutscene Characters

Does anyone know why there are sonic characters in the sprite sheet section of the ABE fandom? Was there a sonic event from back when this game was supported that i missed?