First, get your own tank's HP to 0. This may seem counter-productive, but making your own tank die makes winning a lot faster. Once you have killed your own tank, Don Clawleone will try to infiltrate your tank to get to the engine. He has only two attacks, both of which take time to do, so you can kill him easily. One releases a ring of fire that moves too quickly to dodge. The other makes a shockwave of energy that also moves fast but in only one direction. Once you have killed him, the tank will say that this does not change anything, but it actually does. Until he is resurrected, his tank will not shoot anything, leaving plenty of time for you and Slival to fire rapidly. Once his tank dies, rush towards it and Slival will follow. Do not worry about Don Clawleone destroying your tank, as he teleports to you and tries to kill you. Pay no attention to him, as Slival will try to kill him and break the energy rods in your way. He is good at this, because he can break many at once. Once you reach the engine, which resembles a Kaffrizzle item, Slival will try to destroy it, but cannot. You will still have to do it. After that, the tank will explode like any other tank and you will win. He also has drill-like items that prevent you from using your cannons and Kaffrizzles, which release a group of fireballs that can hurt you.
Easy wins
Do not just shoot at your enemy to protect yourself against his bullets. Shoot yourself to their cannon room and stop them from attacking. This allows your teammates to attack while you are killing the enemy inside their tank.
Giggles in Tank Masters mode
Successfully complete the game. Then, talk to "Meggan", the green Egg Slime in the northwest building of the central part of town.
Gott Schliemen in Tank Masters mode
Defeat the final Boss and rescue all 100 Slimes. Then, defeat Hooly and the Shogun in the last round of Tank Masters mode to unlock Gott Schliemen in Tank Masters mode.
Hidden Chrono Trigger Reference
One of the tanks you encounter resembles a tree and is ironically named 'Chrono Twigger'. The name is a play on words and is a reference to another popular Square Enix game, Chrono Trigger. The name 'Chrono Twigger' is even stylized the same way as Chrono Trigger.
Knightro Slime tank in Challenge mode
Go inside the church and press Y, L(2), Y, R(2), Y, Up, Down, Select to unlock the Knightro tank in Challenge mode.
Nintendo Tanks
To get the Nintendo Tanks, you need to enter a code in various places.
Tank
How to unlock
Bowser Tank
At Forewood Forest, press A B A Y Y L R START.
Mario Tank
At Ducktor Zids Shop, press A B Y Y X L R L L R X Y Y B A B B B A Y X X Y.
No Tank (also refered to as Invisible Tank)
At Ducktor Zids Shop, mash L and R really fast.
Schwarzen in Tank Masters mode
Defeat the final Boss. Then, go to where you defeated Slival on Mt. Krakatroda. Defeat Slival again to unlock Schwarzen in Tank Masters mode.
Strange message
Do an Elasto Blast into a slime or former member of the Plob in the town. They will jump around a lot. If you talk to them once they start jumping less high, they will say something different than what they usually say. Note: This will prevent you from using things like Tank Masters and using Splodgy Dave's store until the corresponding person recovers after a few seconds. Also, you can only do this to the Wyrtle (the dragon/turtle thing with the huge shell) if you do the king of Elasto Blast where you start flashing.
The Nemesis Slime in Challenge mode
Go inside the church and press Y, R(2), Up, L(2), L, Y, Down(3), Y, Select to unlock The Nemesis tank in Challenge mode.
