Loggo

Loggo is a talking toilet seen in both Banjo-Kazooie and Banjo-Tooie. In the first game, Loggo is found in the bathroom of Mad Monster Mansion, where he will offer to flush down Pumpkin Banjo to retrieve a Jiggy from the septic tank. In Banjo-Tooie, Loggo has moved to Grunty Industries, where he complains about a clog. Perform the Bill Drill ability on Loggo to get the Cheato Page which is plugging his pipes.

If the two talk to Loggo in Grunty Industries a second time before getting him unclogged, Kazooie mentions that he call a plumber, specifically, Mario (of Super Mario Bros. fame). However, Loggo doesn't believe that he does that kind of work anymore...

Stop 'n' Swop
In Banjo-Kazooie, the Green Mystery Egg can be found on Loggo.