Here's a set I was thinking:
Down-B: Gadget Change: Allows E. Gadd to switch gadgets to use with his other B moves. Each has different perks. The switch order goes: Poltergust, FLUDD, Brush, to reference their order of appearance in the games. Switching takes a moment, and effects only B attacks. A moves used fixed gadgets, and they will be put away following use in favor of the "equipped" one. Thus, this move changes B moves only.
The lag time on certain moves, however, may change depending on what Gadd has. If he uses a Smash attack and already has the brush out for his B moves, he can attack faster than normal since a switch of gadget is not needed (assuming he uses the brush for Smash Attacks). Similarly, his throws are sped up and made more effective if he already has Poltergust out (assuming Poltergust is used for throws), and his aerials may be faster with FLUDD out (assuming FLUDD is used during aerials). Thus, there is strategy involved in using this at the right time to have the right gadget out, like Olimar and his Pikmin Call.
B: Spray Nozzle: If FLUDD is equipped: sprays opponent backwards, like Mario's current Down-B. No damage but good for gimping.
Polter-suck: If Poltergust is equipped: sucks in an enemy and shoots them out, similar to Dedede's and Kirby's B. Does damage and spaces opponent for more moves.
Gadd Glyph: If Brush is equipped: Creates a paint glyph in the image of E. Gadd that damages a foe that walks into it. Good for camping
Side-B: Turbo Nozzle: If FLUDD is equipped: Rockets Gadd forward based on how long button is held. Damage and knockback depend on distance, but also create a greater chance of self-destruction.
Flashlight: If Poltergust is equipped: Stuns opponents with flashlight, the longer it is held, the greater the range and longer the stun. Stun time increases with % of foe. Will release automatically eventually.
Gadd Glob: If Brush is equipped: Hurl paint glob, covering a small area in paint. Unlike the glyph, it operates like a projectile but causes decreased traction and increased chance of tripping for those who walk over it. Does not damage normally, but on rare occasions, fire of lightning paint may appear and hurt the foe instead.
Up-B: Rocket Nozzle: FLUDD: Rockets E. Gadd upward based on charge level. Must recharge after use for a short time, but good recovery overall with tremendous vertical gain (switching gadgets does not recharge this one, and in fact halts it until switched back).
Polter-gust: Poltergust: Fires a gust of wind downward, quick and reliable, and does not need recharge, but has very limited range. Can be aimed horizontally instead.
Gadd Javelin: Brush: Uses Brush as a javelin on the air, leaving some paint behind that "weighs down" foes who touch it, making them fall faster if they're under Gadd during use. Good diagonal recovery and gives both horizontal and vertical, but can easily be gimped if not careful. Also leaves Gadd in "helpless".
Final Smash: Gadd-gets Galore: Gadd prepares a huge ray-gun that sucks in foes (like a giant Poltergust), and blasts them out in a stream of water (like the FLUDD), leaving a trail of paint behind on the ground for those who dodge, for a short time.
As for A moves, I thought I would leave that open for some ideas from my thread-mate or other users, although I can post ideas of my own if people prefer.
