Challenge 2: Evasion. Try to run in a CIRCLE as much as possible, with some luck you will be successfull.
Challenge 3. Bishop or Pawn first.
Challenge 4. Notice the dragon's weapon has a minimum range of a least 1 bot. So if the shield sticks to it, it is not within range. Let your shield follow the dragon and make sure the shield is in range when approaching it with maximum shot distance for the sword.
Challenge 5: Run along outer edge. Should be easy.
Challenge 6: Keep the soldier between the medic and the commander. Easy as well.
Challenge 7: 1 to 1. Wait.
All the puzzles have 1 definite solution. Except for the 2-4 ones. For the 2-4 ones, keep circling until there is no 100% solution. Then go diagonally across the board so the numbers you click will only hit each unsolved row ONCE.
Upon collision with a random balloon floating in the air, Billy was launched some 30000 ft into the air. Where he subsequently broke through the atmosphere.
TIPS: Set spells to keys Q,E,F and The hidden star for the boss is in its corpse, the skull. Use the pet wolf and fire at the skull after killing the boss.
HINT: For the last boss arena. Kill the engineer and black capt first. Do not hit Dark Zoul as his attacks get stronger. Leave Dark Zoul for last. +To keep alive!
 "Scribble!"){kind=icon}
 "Viricide"){kind=icon}
 "Factory Balls 4"){kind=icon}
 "Boomshine"){kind=icon}
 "Epic Battle Fantasy 4"){kind=icon}
 "Doeo"){kind=icon}
 "BioGems"){kind=icon}
 "Bot Arena 3"){kind=icon}
 "We Become What We Behold"){kind=icon}
 "Qoosh"){kind=icon}
 "Reachin' Pichin"){kind=icon}
 "Rullo"){kind=icon}
 "Brawlin' Sailor"){kind=icon}
 "Billy the Pilot"){kind=icon}
 "Crunchball 3000"){kind=icon}
 "Epic Battle Fantasy 3 Walkthrough"){kind=icon}
 "Sentry Knight Conquest"){kind=icon}
 "Redshift"){kind=icon}
 "Rogue Soul 2"){kind=icon}
It's freely inspired from the FF8 boss battle theme :)