It first appeared as it lands on the Kamerai Palace. It then transforms into a Meditite and continued to play with Monferno, and Lucas and others released their Pokémon to play with what they thought was a Meditite.
After taking them to an attic, Maria sent her two Purrloin after it. To escape, it teleported, along with Monferno. It then transformed once again into Latios and flew the Pokémon to the Stone of Time. While Lucas and the others were looking for Monferno, Celebi kept it entertained with toys.
Celebi also nearly sacrificed itself to save the Stone of Time. Haxorus stepped in and was able to save Celebi, but ended up sacrificing itself.
Celebi is believed to still reside at the Stone of Time. It is last seen playing with Emolga.
Celebi is said to have a very playful nature. It comes now and again to the palace to get some of the toys. It brings these to the Stone of Time, where it would play with them. At the end of the page, Jaden's gloves could be seen among its collection.
Celebi's transformations reflect magical personalities. The Pokémon in this comic that Celebi transformed into were Meditite, Aipom, Latias, and Latios (which Ethan had then seen the two on three separate occasions). However, Celebi did not legally learn this move in games.