Here are some cheats and tips for the game Transformers: Beast Wars Metals 64.
Ravage and Tigatron:
Select vs. or arcade mode. Highlight Cheetor, then hold Z and press A at the
character selection screen. Then, press Left or Right to go through his
colors to get to Ravage and Tigatron.
Starscream:
Select vs. or arcade mode. Highlight Waspinator, then hold Z and press A at
the character selection screen. Then, press Left or Right to go through his
colors to get to Starscream.
Blackarachnia:
Select vs. or arcade mode. Highlight Tarantulas, then hold Z and press A at
the character selection screen. Then, press Left or Right to go through his
colors to get to Blackarachnia.
Fight Megatron X:
Successfully complete the game with Megatron with no time limit. You will
have to fight Megatron X at the end.
Defeat Megatron X:
Press C-Right to keep firing your gun until you get a Energon Strike.
Transform into vehicle mode. Then transform into beast mode and keep pressing
C-Right rapidly until your Energon bar is filled. Get close to Megatron X.
Repeat this you defeat Megatron x twice.
Another advantage happens when both of you shoot something at the same time,
after you fire block. Your shot should hit and his should do minimum damage.
Metal Megatron:
Defeat Metal Megatron in arcade mode to unlock him as a playable character.
Get Rattrap’s armor from the first episodes:
Successfully complete the game including Megatron X and unlock his best
armor.