Hi CoraDora1234,
Thanks for coming to Apple Support Communities for help today.
While what you have achieved here is not an intended use of Memojis, you can find deletion instructions here: Use Memoji on your iPhone or iPad Pro.
"Manage your Memoji
Want to change a Memoji that you already created? You can edit the features, duplicate an existing Memoji with new features, or delete a Memoji.
- Open Messages and tap the Compose button to start a new message. Or go to an existing conversation.
- Tap the Memoji button or Memoji Stickers button , then select the Memoji that you want.
- Tap the More button . Then choose Edit, Duplicate, or Delete. "
We are also unaware of any limit to the number of Memojis that can be created. To take a deeper dive, please visit Apple Support.
Have a fantastic day!