At the fighter select screen do the following.

Effect	Code
Aegis II-c	Hold Fire, Press Start, Move to Aegis IV, Hold Up, Press Fire.
Blue Javelin	Hold Fire, Press Start, Move to Random, Hold Down, Press Fire.
Dark Sword	Hold Fire, Press Start, Move to Random, Press Fire.
Fairy	Hold Fire and Bomb, Press Start, Move to Random, Hold Down-Right, Press Fire.
Judge Spear	Press Start, Move to Random, Hold Down, Press Start.
Miclus	Hold Fire, Press Start, Move to Random, Hold Down-Right, Press Fire.
Raiden mk-II	Press Start, Move to Random, Hold Right, Press Start.
Raiden mk-II Beta	Hold Fire, Press Start, Move to Random, Hold Right, Press Fire.
Slave	Hold Fire and Bomb, Press Start, Move to any plane/Random, Press Fire and Bomb.