This snapshot was difficult enough, with frame precision required, that I slowed the game down, decreased the gravity, and utilised the alternating pause trick to get everyone in their desired position. After a few hours, I managed to get a satisfactory shot.
Note: Unrestricted camera hack was in effect.
Knuckles (PSA) - Pikachu: Created by law_law, with credit to xX_TenkaichiTerror_Xx Blaze1216j. Can be downloaded here [link]
Mephiles the Dark - Sonic: Created by LenSho, with credit to zeno503 and Hax. Can be downloaded here [link]
Daigo village - Smashville: Created by Akiro and Demonslayerx8, with credit to ChibiIceClimberz. Can be downloaded here [link]
Super Smash Bros. ~ Nintendo/HAL Laboratories
Sonic the Hedgehog ~ SEGA