The Crystal Onix (Japanese: クリスタルのイワーク The Crystal Onix) is the 6th episode of Pokémon: Adventures in the Orange Islands.
Ash finds a message in a bottle from a girl named Marissa. She asks for help to find a Crystal Onix somewhere on the island. The reason is her brother Mateo, doesn't feel inspired enough to work on glasswork and needs the Onix to be inspired again. Can they find it?
As the heroes ride the Lapras, Tracey notices something in the sea. Lapras gets the object and the heroes see it is a message in the bottle. Ash reads that if someone sees a Crystal Onix (which Tracey explaines that it is a Onix made of glass), they need to report to someone named Marissa. Ash and Pikachu agree they would like to see the Crystal Onix and depart to Sunburst Island. Tracey tells that artists use glass to make different objects and designs. They hear a man complaining to a girl that she shouldn't have a shop with no merchandise. The heroes appear to see what is wrong, though the man wanders off.
The girl explains that her brother, Mateo, is upset and does not want to make glass. The heroes ask for her name. The girl is Marissa, so Ash shows her the letter. Marrisa is excited, thinking they saw the Crystal Onix, but is told they have not encountered it. Marissa gets sad, but confirms there is that Crystal Onix. The heroes talk to her brother, Mateo. Mateo asks her sister if she bothered these people, but the heroes deny this. They ask him how come his store is empty. Mateo tells that when his grandfather ran the store, he made glass sculptures of Pokémon. When he passed away, Mateo tried to make the glass sculptures, but fails. Ash sees some of them are good, but Mateo throws it away, breaking it, as people complained they aren't perfect, as they don't have that "soul", unlike grandpa's.
Mateo admits he needs an inspiration, thinking capturing the Crystal Onix would do the trick. He knows his grandpa saw the Crystal Onix and got him inspired. Grandpa even made a sculpture of the Crystal Onix. The heroes decide to help him out. Jessie and James admire the glass, but Meowth yells at them, thinking they can steal it. Because of this, the glass falls down, causing Team Rocket a great chill, as the trader tells them if they break, they buy that stuff. Having no money, Team Rocket chop wood. As the traders pass, Team Rocket heard from them Mateo and the kids went in search for the Crystal Onix. Team Rocket know this is an opportunity they cannot ignore.
To help in the search, Tracey sends Venonat. They show him the Crystal Onix scuplture and soon, Venonat leads them to a location where there is a rock resembling an Onix. Tracey is surprised Venonat did not accomplish the task and calls it back. Tracey, however, has a trick under his sleeve - he sends a mouse Pokémon, Marill. Tracey lets it listen a sound of Onix and with that, Marill goes away to search. It led to a strange location - the path appears out of water, leading to the island. The heroes go to it, but fall in a hole, as Team Rocket appears. Team Rocket knew they are going to Crystal Onix and set a trap, so they wander to search for it. Marissa cries, thinking they will steal it, but Ash lets her know they will not capture it.
Using the path, the heroes run to the next island. The heroes come to a cave and see Team Rocket stuck. They admit they made these traps, but got caught in themselves. Meowth tells if they release them, they will lead them to Crystal Onix, but Misty refuses. Marill hears something and the heroes go inside, ignoring Team Rocket's begging. They came to a crystal cave and Marill dives in, confirming there is something. Tracey saw a pair of big eyes and suddenly, the Crystal Onix appears out of water. Mateo sends Cloyster, who uses Water Gun, but Onix is not affected. Cloyster uses more power, but Onix is not affected. Onix roars and tackles Cloyster, defeating it.
Team Rocket appear, wanting Crystal Onix for themselves. Misty wonders how they got out, but they don't want to share the secret and imagine what they could do with the crystal from the Onix. Jessie sends Arbok and James Victrebell. Misty sends Staryu, who repels Arbok and Victrebell and Pikachu electrocutes them. Team Rocket run away and bump into Onix, who blasts them offvia Tail Whip. Mateo does not give up, sending Charmeleon, evading Onix's Rock Throw. Using Flamethrower, Charmeleon burns Onix. Charmeleon uses Ember to heat up Onix. Seeing the Onix's red glow, Mateo has a moment of inspiration, then Onix falls down. Ash tells Mateo to catch it, but Mateo does not want to, as he has his inspiration back. Mateo thanks Onix, who goes back to water. At the store, Mateo makes the glass sculptures, using his Charmeleon to burn the glass. The heroes depart and say goodbye o Mateo and Merissa. Ash notices the sculpture of Pikachu he was given is lifelike and they agree Mateo should have successful business from now on.
- Meowth breaks the fourth wall when he tells the camera to pan down to him before saying his next line.
- The "Who's that Pokémon?" in this episode is Rhyhorn.
- When Ash and co find the island where the Crystal Onix is on a sand bar path reveals itself because the tides go down, however tides don't go down that quickly and if it was a sand bar then the water doesn't need to leave because it would be shallow enough to walk across the water.
- Ash disappears when Tracey introduces his Marill.
- When Tracy calls out Venonat and Marill his Poké Balls doesn't open up.
- When Team Rocket bumped into Onix, Jessie had no gloves.