Growlactus serves as a boss in Startopia. It can be fought by traveling to the Galactic Nexus, and reaching 25,000,000 Star Miles along with having a minimum ship rating of 12,000.
Starting a fight changes the background's weather to the Growganoth weather; succeeding will allow the player to journey to the Heart of the Galaxy, while losing will allow them to journey to the Desolated Waste. Previously, fighting Growlactus permanently renders the player's starship unusable, whether they have succeeded or failed.
- Main article: Guide:Startopia
|Wriggling Tentacle||Bonus prize that comes with certain prizes|
|Vile Vial - Chaos Infection||1/2 (50%), bonus prize|
|HyperTech Starship Blast*||1/4 (25%)|
|Star Tool Droid*||1/4 (25%)|
|Space Thruster Boost Boots*||1/6 (~16,6%)|
|MagTron LightCycle*||1/10 (10%)|
|Startopian Empire - Force Shield & Phase Blaster*||1/10 (10%)|
|EzCookOven's Robotic Tentacles*||1/100-120 (~0.8-1%)|
|Horns of Infinity||1/100-120 (~0.8-1%)|
|TK69's Mystical Etherboard*||1/100-120 (~0.8-1%)|
|Mjolnir||While wearing a Legendary Map - Deciphered|
Note that rewards which have been marked with an asterisk (*) always come with a bonus Wriggling Tentacle.
|Growtopia Fried Wings||Wing Week or Wonder Week|
|Pegasus Chest||Pegasus Pursuit|
|Radical Stage||Anniversary Week|
|Robot Lord Cape||Wonder Week|