Tikal has appeared in the Sonic Universe more than you might think!
Games:
Sonic Adventure
Sonic Adventure DX
Sonic Adventure 2
Sonic Adventure 2: Battle
Sonic Pinball Party (her face is just a tiny stone carving)
Sonic Adventure DX Chao Minigame for GBA
Other:
Tikal appeared in the following Sonic X episodes:
- The Puzzle of the Liquid Life Form, Chaos
- Amy the Captive
- Egg Carrier Battle
- Gamma the Wanderer
- The Cry of Perfect Chaos
Archie Comics:
Tikal appeared in the following issues:
Archie Sonic X Comics:
Fleetway Comics: