getFormeIndex returns the base species (670 or 671), which duplicates
entries on the chain
the evolution checks use the forme ID but also return 670/671, thus
making this unnecessary
closes#1202
check requireslevelup during evolution validity check, not during tree
generation as movepool fetch treats the 'level' as the max possible
level it was at (not the level it was encountered).
fix dropping pkm from external source causing exception (final return
false caused it to proceed with regular dragdrop operation from source
slot).
#1163
Evolution info was not checked for non-eggs; for mystery gifts check
that the level of the evolution is not less than the level of the
matched encounter
fix spacing (cosmetic)
add temp flagging for magnetpull/static slots (will eventually refactor
into something functional that considers a set of slots including
swarm/etc)
