what a Shiny only Pokemon Speedrun would Be (read Description)

Possible games where this is the simiplist: Pokemon Black 1
Complex (requires RNG manipluations) Pokemon GSC RSE and DPPT HGSS B2/W2
Other games without manipulations: Will require either Chain Fishing and Good Luck: XY/ORAS
other later gens: S/M USUM: SOS Method to find HM Users and good Luck for starters
Impossible without leniency: gen 8 and gen 9
Nearly Impossible: FR/LG
Possible Requires Verification Stadium 2 or GSC through link Cable: RBY RNG Manipulate Correct DV values for specific Shinies Required to complete the run