sm0lcatfish
'Oh! And maybe we should have a codeword.. something to warn The G Team if trouble is coming!'
Mumbo left his hand in his suit pocket for a few moments, as well as swimming forward, before removing his hand.
He didn't take out his phone with it.
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Basically an AU where Mumbo feels betrayed for not being invited into G Team 100% and betrays them back.
I had personally always wondered what would have happened if Mumbo didn't, for example, say bananas. This is my headcanons going wild.