Stuff you'd rather not know about Slippy.

Excerpted from Wikipedia:

Beltino Toad (ベルツィーノ・トード, Berutsīno Tōdo^?) is Slippy Toad's father, who works as the Research Director for the Cornerian Defense Forces. Beltino originally works for Space Dynamics Co. Ltd. as an engineer. He and Slippy invent and construct many inventions for the team, including the Blue Marine and the Land Master. Beltino is first mentioned in the Star Fox 64 Player's Guide, but does not make an in-game appearance until Star Fox: Assault, released eight years later. Beltino discovers the way to defeat the Aparoids, and eventually allows Star Fox to destroy them using a program he developed. In the Japanese version of Assault, Beltino Toad is voiced by Hirohiko Kakegawa, and his English voice actor is Scott Burns.

Amanda (アマンダ, Amanda^?) is Slippy's fiancée, who first appears in Star Fox Command. They meet two years prior to the events of Star Fox Command, and instantly fall in love. Amanda occasionally helps the team out in various missions, and pilots the Tadpole (タッドポール, Taddopōru^?), a ship armed with a multi-lock. She considers herself more of the leader in her relationship with Slippy, and always wants to be on his side during a fight. In two endings, she and Slippy settle down with children, one of whom joins Fox & Krystal's son, Marcus McCloud, as well as Lucy Hare's daughter and Falco Lombardi himself in forming a new Star Fox team. In another ending, she herself joins the Star Fox team to be close to Slippy.

Don't ask me, I was looking for stuff on Smash.