puff skip:

positives:
should save a trip to route 11 (not sure if can reach growlithe from crazywarp)
saves a scroll to warp to moon
saves setting up a t-fly
can do brock-flies whenever
(probably) save time on mankey LG

negatives:
forces zubat in victory road
loses time catching puff
loses time getting karp
(probably) loses time on cubone LG
(probably) loses time on magmar LG
longer scroll during crazywarp