Tikal has appeared in 5 Sonic X episodes. Here are summaries of her roles in them:
The Puzzle of the Liquid Life Form, Chaos
Knuckles gets a vision of Tikal's past when he finds a Master Emerald shard. He wanders around, recognising the place but wondering why the buildings look so new. He sees Tikal fighting with her father about attacking the shrine, and then his vision ends.
Amy the Captive
In the beginning of this episode we see Knuckles upset that he broke the Master Emerald. He is ready to give up looking for the pieces, when Tikal sends him another vision of her looking at the burning temple, afraid. This inspires him to go on and continue looking for the pieces. Later, Knuckles finds another Emerald shard and also gets another vision of Tikal. This time, she is at the shrine with some Chao pleading with Chaos to help them. She realizes that she and the Chao can leave but Chaos cannot. The Chao take Tikal up the stairs of the Shrine and Tikal recites the chant about the 7 Emeralds.
Egg Carrier Battle
Knuckles has yet another vision (Tikal sure likes Knuckles, huh?) of Tikal, this time he sees her lying hurt on the ground near the burning Shrine after the attack. He runs over to her to see if she is okay. She tells him that she tried to stop her father. The two look at the shrine and suddenly Tikal springs up and runs towards the Shrine. Knuckles chases after her but soon his vision ends.
Gamma the Wanderer
This time, Sonic has the vision. He finds the ruined temple and looks around, finding the ancient mural of Perfect Chaos. Tikal's voice is heard telling Sonic to beware of Chaos, and then Tikal sends him the vision. In the vision, Sonic sees Tikal holding the dead Chao and being very upset. Tikal declares that she's going to stop Chaos, and then Sonic's vision ends.
The Cry of Perfect Chaos
Both Sonic and Knuckles have the vision near the beginning of this episode. Tikal sends them both to the past, where they witness the attack on the Shrine and the Chao. Tikal pleads with her father to stop, saying that he'll regret it forever. He doesn't listen and he and his warriors knock her down and run to the Shrine. Chaos, angry that the warriors had killed his Chao, swallows the Chaos Emeralds and becomes Perfect Chaos, destroying the warriors and everything else. As Chaos goes elsewhere to wreak havoc, Sonic and Knuckles go over to Tikal. She gets up and runs to the Master Emerald, where she finally realized what the Emerald chant means. They then see Tikal sealing Chaos in the Master Emerald. Finally, the terrible vision ends.
After the heroes rush to the city to stop Chaos, Tikal appears in her true form and tells them that she has traveled through time and space with Chaos to keep his power under control, but this time she failed. She says that Chaos must be sealed in the Master Emerald, but Sonic says that Chaos' anger won't cool if she does that. Sonic's friends appear with the dead Emeralds and give them to him. Sonic then uses the good power of the Emeralds to become Super Sonic. Tikal remarks that she thought that the powers of the Emeralds could only be used by hate and anger, but the others tell her that they can also be powered by love and friendship. Sonic defeats Perfect Chaos, and Tikal approaches Chaos, now back to Chaos 0. Several Chao surround Chaos and Chaos looks happy that not all the Chao have died. Tikal tells Chaos that the chao will now be happy and in peace. The two of them then rise into the air and dissapear.