What version of Sonic are we using? Game Sonic is actually much more powerful than most people would give him credit for, and within his Super Form he'd likely be much faster than Reimu via Solaris bullshit, and he has a lot of pretty good abilities and haxx.

Though frankly, this fight is decided by one thing, Game Sonic has no way around unrestricted Fantasy Nature. Reimu uses it, she floats out of reality itself and becomes untouchable to him. None of his haxx, despite how potent it is, can affect outside of reality to my knowledge. So at the very absolute best, he could maybe just stall the fight for as long as needed, but realistically, that's not going to work.

Reimu's abilities directly target the soul and gradually, overtime, he'll get chipped down until his soul is destroyed or he gets sealed or he just runs out of juice. It would be a very, very long and very much so a fight of attrition, but I'd be on Reimu. Add onto the fact she's likely stronger via Dream World scaling stuff and Sonic's in a bad spot.

ARCHIE Sonic vs Reimu is a very different and much more complicated story though.

1. Lost Judgment - Generally a very tough choice between this and the original Judgment but the sequel just about edges out for me. Incredibly story with a fantastic rival and genuine awesome clash of ideals/beliefs, the best combat system in an RGG game to date, godlike soundtrack, some of the best, most meaty side content the series has had to offer, just frankly one of the best overall games RGG has ever put out.

2. Yakuza 6: The Song of Life - I adore this game, it perfectly ends Kiryu's story in such a grand, climactic, emotional way I can't help it. One of the few games to make me cry at it's ending every single time, and the whole story is equally emotional and well put together. It might also outright be my favorite RGG OST (either it or Y3), it has some of the best long battles in the series, some of my favorite boss battles in the series, and was probably the prettiest game in the series until Lost Judgment rolled around. Only thing really holding it back is the combat being a bit rough.

3. Yakuza 0 - Best overall Yakuza game imo, incredible story, the best combat RGG had to offer until Lost Judgment rolled around, the best multi-character offerings in terms of combat and storytelling, the world is jam packed with shit to do, the progression loop is satisfying as hell, the boss battles and long battles are generally excellent, and its a perfect start to Kiryu & Majima's storylines. Just a fucking solid game that fires off on all cylinders from the moment go.

Not counting anything like the Wraiths I'd say... Breadbugs are like a perfect mix of cute, funny, and cool in gameplay concept. Being a play on the concept of carrying items to base by having a creature who actually carries things to their own base and plays tug of war with your Pikmin is really fun. Not to mention I like how they fit into the general world of PNF, such as how they masquerade as Dwarf Red Bulborbs, just a really neat idea honestly.

I'm also a fan of Jellyfloats, purely from a design perspective, colors are really pretty and the sounds they make are calming and I like where you encounter them. Cannon Beetles are also fucking awesome in how they integrate into the gameplay itself, either being one of the most hazardous enemies in the game or your easy way into slaughtering a lot of potentially dangerous monsters.

Ujadani as the cracked insane person answer though.