First off, the Sonic and Tails sprites are not new. they're actually from Sonic CD. there's a part in Metallic Madness Act 2 where you have to navigtate this part with a shrink ray. before you go "Tails was not in that game!" he was in the 2011 ramake done by Christian "The Taxman" Whitehead and Simon "Stealth" Thomley. These of course are the devs of the upcoming Sonic Mania, so they're responsible for the Tails Sprite, while the original Sonic CD team made the Sonic one.
Second,
You clearly have little faith in what people can do with the FM synth chip, Yoshidious.
And lastly, yes I do think it's neat, Gui. it's one of the many projects from the Sonic Retro/SSRG community I hadn't heard of and it looks polished enough. That being said, Character hacks aren't exactly a new thing, ranging from the mundane such as adding the chaotix or Amy Rose or Sally Acorn to one of these games, to the far more elaborate joke projects out there.
That being said, I think I linked you on twitter a game to try out that wasn't so much a character hack, but something I feel pushes the NES to it's absolute breaking point while showing an unmatched loving tribute to both it's franchise and many others.
Also, I notice the Monochrono plugs, i just forget about them after 5 minutes because if I were to go into a game like Monochrono, I'd rather go in with little to no expectations.
EDIT!: I'm sorry I picked on you for the Pokemon thing. I think the point i was tyring to get across is that we play RPGs for very different reasons, methinks. Pokemon is a series that has NEVER had anything beyond absolutley milquetoast characters, Just like the Legend of Zelda, just like any Mario Game not devleoped by Alpha Dream or Intelligent Systems, just like an astonishing number of Nintendo Franchises.
Pokemon to me has always been a bit of a "Theater of the mind" sort of franchise, and that's where the rabid fanbase for this stuff comes from the gameplay is what's compelling and much like say... a Kirby game, it's easy to either make for an easy game or to challenge yourself by trying to find maybe a less than ideal combination of Pokemon to carry through the game.
I really don't fully understand why I can dig pokemon so much and not love Dragon Quest or Etrian stuff.
What I can say is... Different Strokes for Different Folks!