Slippy is a half human half frog character who is a member for the Star Fox team. A long time friend of Fox, Slippy is a young team member but also very intelligent. He is effectively the team techie. He's the one that looks after the vehicles and equipment the Star Fox team uses, as well as the frog that invents new things and improves existing technology for them. This includes his pivotal inventions the Blue Marine and Landmaster which are both utilised in Star Fox 64, the only time you'll ever find the submarine although the tank does feature in future games not to mention appearances such as the Super Smash Bros. series.
Slippy also has an active role as a pilot, and while his skills are decent he often gets caught in problems and has to be bailed out. Nevertheless, Slippy can prove useful, doing things like analyzing enemy tactics and displaying enemy boss shield gauges onscreen.
 Star Fox
Slippy's first appearance. Slippy is one of the three pilots that assists Fox on his journey to Venom.
 Star Fox 64
Slippy once again takes the role of a support pilot, although he more often needs saving himself. He does possess the special ability to scan the boss' shield gauge, meaning that if Slippy had to pull out of a mission the player wouldn't know how much shield energy the boss had left. You could say that Sector X is his "signature level" as his fate decides the outcome of your next mission, whether it be Macbeth or Titania.
 Star Fox Adventures
Slippy takes a backseat here, opting not to participate directly in this adventure. He does offer Fox advice during the game though.
 Star Fox: Assault
Slippy resumes his role as a support pilot for Fox.
 Star Fox Command
Slippy chose to withdraw from the team prior to the events of this game but returns to the team to help Fox fight the new menace. During this game he has a close relationship with another frog called Amanda. Slippy's new ship is the Bullfrog. It has one of the worst boost gauges in the game and no lock-on but possesses powerful plasma lasers, amongst the best shielding and is the only ship that holds three bombs.
 Super Smash Bros. Melee
Although not a playable character Slippy makes several cameo appearances in the game. Slippy is a trophy that can be earned by the player. In addition Slippy will sometimes speak over a communicator (in a fashion much like how the team spoke in Star Fox 64). This occurs at the Star Fox stage in Adventure mode or when Fox or Falco trigger their special taunt on one of the Star Fox stages. Finally, one of the events in Event Match Mode involves cloaking devices supposedly invented by Slippy (according to the event match description).
 Super Smash Bros. Brawl
Slippy once again makes some cameo appearances in this game. A trophy of Slippy can be obtained. He will also speak over the communicator as before when the special taunt is triggered. If Snake does his special taunt at Shadow Moses Island then Slippy might advise Snake on how to beat Falco.