ok, NOW i'm cooking - Mystery Inc. vs The Mind Flayer

[noninho]

Spoiler: Lore w/ details

(major details in bold and italic)
Before knowing much of the monster they were defeating today, Mystery Inc could evacuate everyone inside Old Arcade Mall, but they noticed they don't know much about it, and the clues they gathered with the shady mayor (who was their main suspect) said that they have only 5 minutes to prepare before the monster comes from the ceiling and starts wrecking everything! The gang's hometown is near so they have come here before, but it's being so long that they don't know 100% of the mall! How are they gonna get out of this one?

Spoiler: TLDR

Battle's at Old Arcade Mall, the gang don't know all of it but they have been here before, 5min of prep time. No optional equip, speed unequal

Shaggy | Fred | Scooby | Velma | Daphne -
The Mind Flayer -
Incon

 

[Arkenis]

Is a win just them incapping it or do they have to send it back to the upside down?

 

[noninho]

Is a win just them incapping it or do they have to send it back to the upside down?

according to SBA, incapping is fine

Victory Conditions: Death of the opponent, removing the opponent from the battlefield for at least one week (BFR), knocking the opponent out for at least one hour, or incapacitating the opponent by putting him in a state in which he can not harm the other fighter(s) for over a day, are to be assumed as victory conditions.