Custom Robo Arena/Part Combinations

Trap and zap
This is an effective combo that can be used relatively early in the game. Use bombs and pods to trap the foe, then use the thunderbolt gun to hit, and use your physical attack while the enemy is stunned. Use bombs on the enemy or shoot again if the enemy is too far away for a physical attack.
 * Robo: swift.
 * Gun: thunderbolt gun.
 * Bomb: any bomb that can box in enemies, making them easier to hit. The winder bomb is a good bet.
 * Pod: your choice.
 * Legs: formula legs are recommended, but not necessary.

Stun Gun Combo
A powerful combo that can take down even the toughest opponents when used correctly. Use bombs to box enemies in, then use great ground speed or quick and unpredictable air dashes to get close enough to use the stun gun. Hit with the stun gun, then use your physical attack. Once the enemy is down, use a combination of more stun gun shots, physical attacks, and wall pods to dole out the damage.
 * Robo: any fast robo with a physical attack that is powerful and can hit foes right next to you (any little sprinter or raider with the right kind of physical attack will work, like the robin. Strike vanishers, burning beasts, and wild soldiers are good for approaching from the air. The leon burning beast is a good one.)
 * Gun: stun gun.
 * Bomb: your choice, but the winder bomb is a good bet.
 * Pod: wall pod.
 * Legs: formula (for ground models) or any leg that increases the speed or distance of your jumps and air dashes (for aerial models).

Firewall
A combo that is very effective against enemies who move quickly, or attack at close range. The most important thing about this strategy is to not let your opponent get too close to you. or better yet, let them get close, then wail on them with the wall pod. use the wall bomb to halt advances and as an offensive weapon (move the bomb target to near or in front of your enemy), and use your gun any time you see fit.
 * Robo: a high power robo is best, but any robo will work.
 * Gun: there are several guns you can use, but some of the best ones are the long range kind. The afterburner gun is good for this.
 * Bomb: wall bomb.
 * Pod: wall pod.
 * Legs: formula legs are suggested, but you can use others if you wish.

Flying with the eagles

 * Robo: any lightning sky model.
 * Gun: eagle gun.
 * Bomb: bombs that can stun or trap enemies or any bomb with a "C" type blast work well.
 * Pod: same as the bomb, but don't use the buster pod.
 * Legs: plus one legs.

A combo that sets traps and deals good damage if it works. Fly around with the lightning sky air dash, while shooting eagle shots. Normally, this would cause you to need a quick cool down from the gun, but since you are flying, you don't have to. Set up several eagles, then trap or stun your enemy with bombs and pods, and let the eagles do the rest. Don't forget that you can air dash twice with the plus one legs.