Great info in this and the other guides that have been posted at Daily so far.
I'll be referring to these and other sources (including Bulbapedia) at various times since I got rid of my strategy guides for the Game Boy-era Pok?mon games (including Generation II) not long after trading in my Game Boy cartridge versions of them, thinking that I would never be playing them legally again (and thus, wouldn't need those guidebooks).
Updated yesterday with a note on how to change the time, and just now we have solutions for a lot of puzzles (e.g. Farfetch'd in Ilex Forest, Team Rocket segments, Morty's gym, etc). Ice Path coming soon!