As for Tingle, I have a hard time seeing what he could now that the Villager is in, and has a similar concept.
They really aren't that similar outside of a balloon and slingshot.
Tingle isn't just some dabbler of random tools.
In Rosy Rupeeland, Tingle's main form of fighting consists of old-cartoon styled "dust cloud" assaults. This gives the impression of Tingle being a slapstick fighter with very exaggerated animations and over the top attacks that could basically be summed up as "Three Stooge Style". This would not be entirely out of character for Tingle either, given how eccentric he has shown to be.
Another key aspect of the game is the Bodyguard system. Since Tingle is kind of weak on his own, in order to advance through the game, Tingle has to pay various characters to serve as his "Bodyguard" throughout the game, giving him an edge in combat and completing puzzles that Tingle cannot do on his own (such as a Small Bodyguards squeezing through small holes, Medium Bodyguards picking locks, and Large Bodyguards tossing and smashing boulders that are in the way).
In Smash, this could be reflected as Tingle having generally weak attacks, but can pay to call forth a Bodyguard (either Teddy Todo, the first Bodyguard in the game as well as one of the three "Drifter Bodyguards", or as a double reference, among Kakashi, Buriki, and Lion from Love Balloon Trip) that serves as a follower that assists Tingle in combat until the Bodyguard runs out of health.
Which brings up a gimmick idea (which you probably won't like, but I don't care); Rupees.
In every game Tingle is in, Rupees (or an alternative form of currency) are a major part of him, and Rosy Rupeeland is no exception.
In that game, Rupees are literally his lifeforce due to a curse. He will die if he has no Rupees. BECAUSE they are his lifeforce, it makes various game decisions much more critical.
With that in mind, Tingle could feasibly have a Rupee system in Smash. By fighting his opponents, he gets Rupees from them that add to a Rupee Counter. Certain actions (such as hiring a Bodyguard) require paying from his Rupee Counter. Alternatively, Tingle can fire his collected Rupees in a machine gun fashion, much like how you combat the final boss in Rosy Rupeeland.
Unlike in Rupeeland however, having no Rupees does not mean death; it just means you're heavy limited in what you can do and have to get more, which COULD mean death depending on the situation.
In Love Balloon Trip, Tingle's main form of "combat" is a slingshot. However, a major aspect of the game is the Love Push. This game is focused more on getting women to love you, and you have to get all the available women to want you to be able to finish the game. The Love Push is essentially a Harvest Moon-like gift giving to the available women. You have to give them the right gifts that will make them fall for you.
In Smash, this could be referenced as a move where Tingle holds out a present with heart-filled eyes that paralyzes an opponent who is near it with disgust (if opponent is male), infatuation (if opponent is female), or confusion (if opponent has no determinable gender or is a Pokémon), giving Tingle (or his Bodyguard if he has one) enough time to strike.
All of that alone from his games is enough to show how viable he is for a unique set of moves and overall style.
I apologize for the wall of text; I was not expecting my post to end up that way....