What collaborations has Janis Elspas engaged in for her 2020 Halloween content?

I'm sorry, but based on the information I have, there's no specific mention of any collaborations that Janis Elspas engaged in for her 2020 Halloween content. She shared ideas about making Halloween special, such as painting pumpkins and creating themed family costumes. However, these appear to be her own ideas or activities with her family, rather than collaborations with other creators or brands. If you're interested in more specific details or other aspects of her work, feel free to ask!