Here is the full list of all 50 Doughlings: Arcade achievements.
Morph 75 times to Bedrock.
Show Off with Bedrock 50 times.
Morph 75 times to Webster.
Show Off with Gunner 50 times.
Show Off with Robo 50 times
Morph 75 times to Robo.
Morph 50 times to Spook.
Show Off with Webster 50 times
Morph 75 times to Gunner.
Show Off with Smash 50 times
Morph 75 times to Smash.
Fully upgrade all heroes.
Fully upgrade Webster.
Complete all Secret levels.
Shot 50 Killers.
Fully upgrade Bedrock.
Complete 75 levels with 3 stars.
Complete 75 levels.
Heal 50 Psychos.
Fully upgrade Robo.
Teleport your ball 50 times between wormholes.
Show Off with Spook 50 times
Bounce ball from hero 5000 times
Fully upgrade Spook.
Banish 100 Ghosts.
Unlock all heroes.
Bounce ball from walls 10000 times.
Complete 50 levels.
Fully upgrade Gunner.
Fully upgrade Smash.
Heal 50 Flu targets.
Catch 100 balls with Robo
Heal 500 Red targets.
Show Off with Morpheus 100 times
Shot 500 bullets with Gunner.
Show Off 100 times.
Complete 25 levels.
Destroy 100 Petrified targets.
Morph 100 times.
Save 100 Stuck targets.
Heal 500 Yellow targets.
Die 10 times.
Fully upgrade Morpheus.
Fully upgrade any hero.
Complete 1 secret level.
Heal 500 Green targets.
Complete a level by clearing the screen before the time runs out.
Heal 500 Blue targets.
Get your first 3 stars.
Upgrade any hero with one slot