Playing multiplayer before campaign..??

So I decided a few days ago to jump in a play. Right after Multiplayer was unlocked for me, I headed there. I dropped $20 and cashed in on some Mortys. Now, if I were to complete the campaign and transfer the 3 Morty's over to my Multiplayer, I hear data gets erased? Will I lose all my Morty's or just my level?? Please and thanks.

If you want to start multiplayer over again, with three new Mortys, then you need to delete your current multiplayer data... so yes, what you have will be erased. You can continue to play campaign without any issues, you just can't bring new Mortys in without resetting.

If you delete multiplayer data, you lose the Mortys and the levels.

If you have another device, just create a second account and send your Mortys over in order to preserve them.

Sometimes progress needs restart from 0 to build new masterpiece!

Or didn't Michael Angelo blank the whole Sistine chapel to create the masterpiece fresco paintings in the Vatican city?

You might need to do the same, but with mortys...

Its much better to beat the campaign and enter multiplayer with some badass mortys