after mr pokemon 2nd egg

Key Items
Switch top egg with bottom egg (in that order)

Balls
Scroll all the way down to Master Ball x0, press Select on it
You'll be bopped back up, switch it to the 2nd slot

Leave Mr. Pokemon, go to Center, catch something on the way with the Master Ball x0 (ball count won't be decremented)

At PC
Deposit starter
Deposit items
Deposit 7 Antidotes (Bicycle)
Switch to Balls
Deposit 245 Master Balls (Down x2, Left x1; HM03)
Deposit 239 ? (Down x8, Left x1; TM47)
Switch to Key Items
Deposit Mystery Egg and S.S. Ticket (underflow Key Items)
Exit PC

Key Items
Switch 1st ? with 2nd ?
Use HM03 five times

At PC
Move Pkm w/o Mail
Move starter into party
Toss 202 Master Balls (Down x4, Left x4; Max Repel)
Exit PC

Exit Center

Key Items
Use Bicycle (Select don't work)
Use Max Repel

Metatweak past first trainers w/ s+q (dex mode fucked)
Purchase Flower Mail at Violet (sub for dex)
gofuckred