NGL The Super Sonic Spirit or the Super Shadow Spirit mixed with Fast Spirits is kinda speed OP if you do that and attach your spirit to Sonic Shulk (XenoBlade Speed power) or Kirby (taking Shulks power and doing the same thing)
Mainly if you are having a troubles time in Melee, then this might be your place, I'll give you want the game considers good and what the game considers bad, I am a Yoshi/Bowser mains and Yoshi is The 10th to 9th best character and Bowser is the worst, I pick who i like and who I know there move...