Roysten

"Please help me! Because if I die, your garden will smell of dead fish."

- Roysten

Roysten is Banjo's pet goldfish, serving little purpose aside from being caught in dangerous situations. He was named after one of the artists that worked on Banjo-Kazooie, who the development team "couldn't believe [had] been given [Roysten] as a middle name".

Banjo-Kazooie
In Banjo-Kazooie, Roysten can be seen in Banjo's house, swimming in his fishbowl. Near the ending, there is a cutscene that shows Mumbo Jumbo cooking Roysten on a barbecue.

Banjo-Tooie
In Banjo-Tooie, Roysten can be seen in Banjo's house, swimming in his fishbowl at the start of the game. After Gruntilda blows up the house, he ends up trapped under a boulder. When Banjo and Kazooie approach it, Roysten explains to them that he was knocked off the barbecue and trapped under a large rock, which he begs them to destroy so that he can be freed. The rock can be destroyed using the Bill Drill ability. Once Roysten is freed, he asks to be put into a body of water, so Banjo puts him in the moat around Spiral Mountain. There, Roysten teaches the Fast Swimming ability to Banjo and Kazooie and increases their oxygen supply from 6 to 10 bubbles.

Inside Blubber's Waveracer Hire in Jolly Roger's Lagoon, a Signpost hinting at Roysten's functionality can be found.

In the character parade, Roysten is not shown as a standalone character, but there is a cutscene where Roysten is blackened to a crisp on a plate, and Mrs. Bottles serves him to Bottles, angry that he arrived home so late. In the Xbox Live Arcade release of the game, this Roysten's name appears in the scene alongside Bottles'.

Banjo-Kazooie: Grunty's Revenge
In Banjo-Kazooie: Grunty's Revenge, Roysten makes a cameo in the opening and ending cutscenes, where he is seen on a barbecue outside of Banjo's House, just like in Banjo-Kazooie's ending.

Banjo-Pilot
In Banjo-Pilot, Roysten can be found inside his fishbowl in a shelf of the trophy room. This is the only game where Roysten has orange eyes instead of blue.

Banjo-Kazooie: Nuts & Bolts
"Bear's unlucky goldfish get cooked and squashed in previous games. Now Roysten have major vehicle accidents too!"

- Mumbo Jumbo

In Banjo-Kazooie: Nuts & Bolts, Roysten appears in his fishbowl on the main menu. He is also featured in the Goldfish vehicle part, unlocked through the Stop 'n' Swop feature, by obtaining the Blue Mystery Egg in Banjo-Kazooie's Xbox Live Arcade release. It is one of the required parts to make the L.O.G. Banjo vehicle, one of two vehicles (the other being Humba Boat 2) to use a Stop 'n' Swop part.

Other appearances
In Grabbed by the Ghoulies, Roysten can be found in a fishbowl in the classroom of Ghoulhaven Hall. Like in Banjo-Kazooie, Roysten swims around in circles and occasionally taps his bowl three times.

In Viva Piñata, Viva Piñata: Trouble in Paradise and Viva Piñata: Pocket Paradise, Roysten appears atop Miss Petula's head.

In Kinect Sports: Season Two, Roysten appears inside his fishbowl in the mini-game Prize Driver.