Eyecatch cards are cards with different information of the various characters and objects that appear in the anime series Sonic X. These cards can be seen during different episodes of the Japanese version of Sonic X. They contain information about a specific subject that is used in the episode, such as their weight, height and age.
- Sonic the Hedgehog, Miles "Tails" Prower, Knuckles the Echidna, Amy Rose, Cream the Rabbit, Rouge the Bat, Dr. Eggman and Christopher Thorndyke are the only characters with two eyecatch cards in the series.
- Several subjects' eyecatch card artworks are based on artwork used in Sonic the Hedgehog series games.
- Chaos 4, Chaos 6, Egg Hornet and Froggy's artwork are based on art for Sonic Adventure.
- Egg Golem's artwork is based on art for Sonic Adventure 2.
- Super Shadow's artwork is based on art for Sonic Adventure 2: Battle.
- Cream's artwork is based on art for Sonic Advance 2.
- Emerl's artwork is based on art for Sonic Battle.
- Vector's artwork is based on art for Sonic Heroes.
- Charmy Bee is the only member of the Chaotix to have his own eyecatch card.
- The Chao, Chaotix, and Marmolim are the only cards that show more than one character.
- "Countdown to Chaos" is the only episode to feature only one eyecatch card.
- "A New Start" is the only episode in series 1 (seasons 1 and 2) that does not feature any eyecatch cards.