Playtonic could make a nice reference with Trowzer without it feeling forced. When he teaches Yooka the camouflage move (like Kazooie couldn't initially fly in Banjo-Kazooie until Bottles taught her the move), he would suddenly take his trousers off and says he's going into 'Naked Snake' mode while showing you how to hide from enemies.
If there's an invincibility move he could go Solid Snake mode as well, tons of MGS references available! They're also all kinda risky though, in terms of being PG haha
I didn't realise how similar Trowzer's shorts are to Banjo's! Looks like a direct reference and maybe even the blue patch references his backpack (probably reading into it too much).
I love Trowzer's animation. I find it funny how he hides that huge phone in his shorts. Wonder what else he could pull out of there if you watch him long enough in-game....