- "An up-and-coming inventor always looks for other up-and-comers. Hee, hee, hee."
- — Cosmo 
Cosmo is an inventor from the Space Kingdom. Although their inventions are quite useful, they're also prone to having life-threatening drawbacks. Cosmo has a habit of showing up right when needed by our Heroes … and also disappearing right when needed.
Cosmo could be called eccentric, but also farcical. They don't say much, and have a smug sort of smile. Cosmo is shown not to care very much about other people's health or safety, even willing to partner with known bad guy Glitchmaster, and some of their inventions are made with incredibly nefarious and destructive intentions, including a plan to literally blow up the sun.
Cosmo is a very talented inventor, especially for someone referred to in the fact file as a kid. They are able to build fully functional ships and install complicated programming to their inventions.
|Cucumber | Almond | Sir Carrot | Princess Nautilus||Nightmare Knight | Queen Cordelia | Peridot|
|Splashmaster | Noisemaster | Mutemaster | Rosemaster | Quakemaster | Thebestmaster | Glitchmaster | Mistmaster|
|Bagel | Bacon | Baguette | Biscotti | Blueberry | Bruschetta | Captain Bubblebeard | Chardonnay | Cinnabar | Cirrus | Commander Caboodle | Cosmo | Count Legato | Crabsters | Cumulo Puffington | Dahlia | Dame Lettuce | Dream Oracle | Grizzlygum | King Aster | King Clarinet | King Croissant | King Kelp | King Ruby | King Sunflower | Lord Cabbage | Lute | Mandolin | Maple | Obsidian | Panpipe | Princess Ametrine | Princess Azalea | Princess Parfait | Princess Piano | Princess Sunshine | Queen Conch | Queen Cymbal | Queen Sapphire | Rubus Brambleby | Sir Tomato | Tartelette | Tephra | The Guardener | The Sun | Tulip|