If you can't tell whose saying what, here's a simple list of whose text color is whose.

Text color
Red-Mario
Dark Red-Ness
Gold-Lucas
Teal-Marth
Dark blue-Ike/Sonic(though Sonic's blue is slightly brighter than Ike's)
Bright Green-Toon Link
Green-Link
Dark Green-Luigi
Silver-Pit
Orange-Fox
Orange-Yellow-Wario
Light Blue-Samus
Grey-Snake
Blue&Red-Falco
Very Dark Gray-Wolf
Very Dark Red-Bowser
Pink-Peach
Purple-Zelda
Yellow-Pikachu
Red&Dark Blue-Captain Falcon
Midnight Blue-Rumeidia
Pinkish-Red-Kirby
Very Dark Purple-Meta Knight
Brown-ROB
Red&Teal-King Dedede
Lavender-Gigglypuff
Black&Blue-Lucario
Black&Red-Red(y'know, Pokemon Trainer)
Bright Red&Green-Yoshi
Red&Yellow-Donkey Kong/Diddy Kong
Dark Grey-Dr.Mario
Reddish-Orange-Roy