Reversed character select:
Highlight Draco (the training character, far left in the front row) 
and hold Start. Player one will be able to choose player two's 
character and vice versa. 

Play as Carbunkle:
Highlight Arle (the main girl character, second from left in the 
front row) and hold Start until Carbunkle appears. 

Play as Satan:
Highlight Shin (the character to right of Arle) and hold Start 
until the Satan appears. 

All characters are elephants:
Highlight the elephant (far left in the back row) and hold Start. 

Random character select:
Highlight Lulu (far right in the front row) and hold Start.