
What's a Melmetal???
Melmetal is the newest Pokemon, a mythical Pokemon presumably for Gen 8 in 2019. It's a pure Steel type and its pre-evolution, Meltan, can be found in Pokemon Go (the mobile game) and Lets Go Pokemon Pikachu/Eevee (for Nintendo Switch). Melmetal is made up of many Meltans, which triggers its evolution.
Since Melmetal is so new, we don't know much on what it can do. It punches with its fists, and its signature move is called "Double Iron Bash", which hits twice with flinch chance. In the lore, it is believed to have the ability to create metal.
Melmetal is basically not going to happen for the base roster, but it could be an interesting choice for DLC, especially with the "Grinch leak" in consideration. Perhaps we aren't getting a Gen 7 mon in the base roster because Gen 8 is coming within a year of Ultimate's release. If that's the case, Meltan is currently getting promotion (and is the only one so far), so as far as speculation is concerned, this is literally our only option for a Gen 8 character right now.
Fighting Style
My idea for Melmetal is a bit out there, but given that it is made of Meltan, perhaps it can create Meltan when attacking, which shrinks its hitbox as it is shedding Meltan from its body to attack. As it shrinks, its attributes change: it's lighter, faster, falls slower, etc. While on the stage, the Meltans are fairly helpless as they can't move. However, they do attack with Melmetal in a very basic format: any special attacks release a small electric shock from its eye doing 1% and no knockback, while any other attack causes they to tackle in the direction towards Melmetal. One of its specials, probably the down special, brings all of the stray Meltans back to its core, resetting any stat changes. Stray Meltan can be knocked off the stage, and therefore cannot be called back to Melmetal. Basically, think a bit like a very simplified Luma with a Pikmin mechanic on it. There can a maximum of 5 Meltan on the stage. Any that have fallen off do not count towards this total.
Stats:
Size: Ridley (largest) --> Link (smallest)
Walk Speed: 0.67 (largest) --> 0.89 (smallest)
Dash Speed: 1.1 (largest) --> 1.45 (smallest)
Weight: 140 (largest) --> 105 (smallest)
Basically, this is a lumbering giant that mostly attacks by having its minions do the work for it. This thing basically weighs a ton in lore and that would probably get reflected in Smash to an extent.
Meltan's is half the size of Kirby, has a weight of 15 and has no horizontal movement stats (but does fall as slow as Kirby).