Captain Toad likes to go on adventures, but due to his heavy backpack and his inability to trust anybody/anything with it, he can't jump high at all. At this point, nobody really knows if he knows how to jump.
He's a real big fan of collecting rare items, for example, he has a bunch of Power Stars and likes to keep them, he doesn't use them for power, though he's seen a lot of others trying to use them against him/take them from him. Somehow, he finds a way to stop that. Good on him.
FUN FACTS
Captain Toad, as implied above, is a big fan of Power Stars! Always carrying at least one around wherever he goes.
Captain Toad refuses to remove his backpack on the adventure. No matter how dire the situation is.
Captain Toad loves travelling the world, sometimes Toadette even comes along for the ride!