It would be really great if you could sync your squad's shots up. Like so you can dodge and weave through the bullets and then when you are in front of the enemy, have all your grenadiers shoot their grenades at once
Tips for hard badge: Gonna take a while to get the upgrades so just stay in story mode and max pickpocket, faster money that way. Don't buy Brutus or any other fighters, they do nothing except make launching perfectly harder. Max Body Building and Cops and most of the special gummies too. Always rocket slam when getting close to the ground, try and stay at top speed as long as possible, oh yeah max top speed as well. Good luck, hope this helps.
This game was so hot when it came out and now nobody plays it anymore. What a shame. I once faced aeiou and he kicked my ass. He did have a huge amount of boosts, though.