Guess the Smash Bros. Spirit fight!

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Basically I've put together a group of potential Spirit fights inspired by those in Ultimate. Made an initial set of eight and will put together more after those are cleared through, though people can also feel free to come up with their own if they like.

As a hint will say that of this initial group two debuted in arcades (though one isn't heavily associated with it), one on the GBA, two on the N64, two on the Switch (though one was multi-console), and one on the PSP. Might give the publishers of the games if that doesn't help with narrowing it down a bit.

A further hint, two of these are Nintendo, one is Capcom, the rest are companies that don't have a character in Smash Bros.

The alternate costume names are going off the ones used here, so consult with that for reference on which I mean -

www.ssbwiki.com/Alternate_costume_(SSBU)

Note that some of these are rooted in spoilers for their respective games.

1
Fighter: Jigglypuff
Costume: Pink
Stage: Gamer
Conditions:
- The enemy starts the battle with a Killing Edge
Music:
Marionation Gear
www.youtube.com/watch?v=YBc87O-4zDU

2
Fighter: Greninja
Costume: Purple
Stage: Suzaku Castle
Conditions:
- The enemy starts the battle with a Killing Edge
- The enemy's melee weapons have increased power
Music:
Douchuumen - The Mysterious Mursame Castle
www.youtube.com/watch?v=BTt03mAMLpk

3
Fighter: Richter
Costume: Black
Other Fighter(s):
Zelda (ally)
- Black
Stage: Unova Pokemon League (Omega)
Conditions:
- Gravity is low
- You lose if your CPU ally is KO'd
Music:
Lords - A Chance Encounter
www.youtube.com/watch?v=PWY1JYBKx_I

4
Fighter: Simon
Costume: Yellow
Stage: Norfair
Conditions:
- Stamina Battle
- The enemy breathes fire
Music:
Dragon Battle
www.youtube.com/watch?v=jBWrfiz_MGA

5
Fighter: Pit
Costume: Black
Stage: Gaur Plain (Battlefield)
Conditions:
- The floor is lava
- The enemy prefers neutral specials
Music:
Coliseum Series Medley
www.youtube.com/watch?v=ACbUwGz2afo

6
Fighter: Sheik
Costume: White
Other Fighter(s):
Link
- Indigo
Stage: Great Plateau Tower
Conditions:
- Tiny Sheik
- Defeat the main fighter to win
Music:
Main Theme - The Legend of Zelda: Breath of the Wild
www.youtube.com/watch?v=OJ3LsiC-41k

7
Fighter: Incineroar
Costume: White
Stage: Boxing Ring
Conditions:
- Stamina Battle
- Gravity is low
Music:
Golden Forest - 1080 Snowboarding
www.youtube.com/watch?v=Ld7Zoq9Ks-E

8
Fighter: Daisy
Costume: Purple
Other Fighter(s):
Palutena
- Blue
Stage: Gerudo Valley (Omega)
Conditions:
- Defeat the main fighter to win
- The enemy tends to avoid conflict
Music:
Outdoors at 7 PM (Sunny) / Main Street
www.youtube.com/watch?v=gETMaEdRM5Q