Planet Kragg is similar to the old-style combat arenas in previous titles. There are only three total cups to do, with the Gold locked until later in the game. To progress further on Planet Silox, you only need to finish all of the battles for the Bronze Cup, which will net you the GrummelNet Jetpack. All challenges offer a unique reward the first time through, which is reduced to 1,000 bolts on a second run through it.
| Introductory Beating | Reward: 3,000 Bolts |
|---|---|
| This is a fairly easy challenge and as the name says, it's an introduction. It's a simple predetermined amount of waves of enemies, with your only goal to defeat all of them. It starts out with the Bladeballs, then goes on to the melee Thugs. Eventually you'll fight the ranged Thugs and there will be some bomb Thugs in the last round. | |
| Mangled | Reward: 4,000 Bolts, 2 Raritanium |
| This battle has a large electrified tower in the middle of the arena, which sends out a shockwave every few seconds. Simply just over the shockwave to avoid it. The enemies in this round consist solely of flying Thugs, who will easily go down by using the Omniblaster. | |
| Pest Control | Reward: 5,000 Bolts, 2 Raritanium |
| You are timed for this challenge, where you simply have to defeat all of the enemies. Those enemies are the Serathoids, or bug-like creatures, you've been fighting along the way, as well as the things that produce them. The Fusion Grenade is a great weapon to use to quickly get rid of a lot of the generators, then use another weapon to do the clean up. | |
| Blazebot Battle | Reward: GrummelNet Jetpack, 6,000 Bolts, 4 Raritanium |
| The final battle of the Bronze Cup pits you against a giant robot similar to the one you fought right before the orphanage on Yerek. In fact, it has the exact same moves, so you shouldn't have to do anything different in this battle. Note that there will be Thugs that appear in the battle, so either take them out or concentrate on the Blazebot. | |
