Where can I find a certain Pokemon/item/move?

                
Moves:
https://forums.pokemmo.eu/index.php?/topic/89406-storyline-guide-hm-locations/&tab=comments#comment-1572997 for HMs
https://forums.pokemmo.eu/index.php?/topic/106577-finding-every-move-2nd-edition/ for tutor/TM moves
https://forums.pokemmo.eu/index.php?/topic/75521-move-re-learner-guide/ for levelup moves
"Special" moves can be bought for BP in the Trainer Tower/Battle Frontier/Battle Subway
INFORMATION BELOW IS OUTDATED, AS SINNOH HAS BEEN ADDED RECENTLY AND LOTS OF THINGS CHANGED
https://forums.pokemmo.eu/index.php?/topic/51560-pokemmo-guide-implemented-pokemon-locations-held-items/ for single encounters Kanto/Hoenn
https://forums.pokemmo.eu/index.php?/topic/76530-pokemmo-locations-2019/ for Unova
https://forums.pokemmo.eu/index.php?/topic/94253-horde-guide-2019/ for hordes
Items:
https://forums.pokemmo.eu/index.php?/topic/76837-pokemmo-item-dex-2019/ 
https://forums.pokemmo.eu/index.php?/topic/76529-storyline-guide-kanto-hoenn-sinnoh-unova-complete-walkthrough-all-items-hidden-items/
https://forums.pokemmo.eu/index.php?/topic/77124-pokemart-item-locations/