Start making an adventure, and set an unshared modded creation as either the player or an NPC. (or as a disguised gate using glitches)

Make sure that the adventure is more than just a blank planet, because we need people to play the adventure for the modded creation to download.

When you share the adventure, make sure that the required mods are listed in the description, and then share it. Once you continue, you might notice that the modded creation wasn't shared correctly. (no "games used" thing or comments section)

When a user plays the adventure, the modded creation will be downloaded.

I would also make a guide about making an NPC sound like a girl (e.g Mrs. Spoffit in Adventure Town), but all you need to do is to add either an omnivore beak or an insect mouth to your creature. Omnivore beak sounds more like an actual female, while the insect mouth sounds like Mrs. Spoffit in Adventure Town. I accidentally discovered this.

My other guides for GA: https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1309713850

Q:How does this work?

A:I literally have no idea.

Q:Who would want to share a modded creation?

A:People who prefer making modded creations with mods like Dark Injection, who may think that the base game (with C&C of course) doesn't have enough parts.

Q:I can't even share an unmodded creation. How can this guide help me?

A:You need a Spore account, there should be plenty of tutorials for making one.

Q:When editing or loading the adventure, the creation is replaced. What can I do?

A:You need to re-save the modded creation by editing the description. Once you've done that, share the creation with the adventure.

Q:What if I'm playing someone else's modded adventure and it tells me I don't have the parts required to see certain creations?

A:If you don't have the parts, the game will crash when the modded creation is downloaded and the creation won't download. The adventure won't be playable until you get the mods required, because Spore doesn't know that it uses modded parts. Adventures which use modded creations should say what mods they require. (e.g Dark Injection or the fur mod)

Q:One more thing. If I have the bot part dlc, will someone be able to view it if they also have it?

A:Yes.