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