This section will provide external links to Bulbapedia, the best pokemon online wiki (in my opinion), with references to elements of the Pokemon Universe that are important to the story or would help understand certain facts and that I don't expect every reader to know or remember properly.
Breloom - https://bulbapedia.bulbagarden.net/wiki/Breloom_(Pokémon)
Bug catcher - https://bulbapedia.bulbagarden.net/wiki/Bug_Catcher_(Trainer_class)
Double Battle - https://bulbapedia.bulbagarden.net/wiki/Double_Battle
Dustox - https://bulbapedia.bulbagarden.net/wiki/Dustox_(Pokémon)
Evolution - https://bulbapedia.bulbagarden.net/wiki/Evolution
Great Ball - https://bulbapedia.bulbagarden.net/wiki/Great_Ball
Growl - https://bulbapedia.bulbagarden.net/wiki/Growl_(move)
Headbutt - https://bulbapedia.bulbagarden.net/wiki/Headbutt_(move)
Hi Jump Kick - https://bulbapedia.bulbagarden.net/wiki/High_Jump_Kick_(move)
Hoenn - https://bulbapedia.bulbagarden.net/wiki/Hoenn
Howl - https://bulbapedia.bulbagarden.net/wiki/Howl_(move)
Hyperbeam - https://bulbapedia.bulbagarden.net/wiki/Hyper_Beam_(move)
Machamp - https://bulbapedia.bulbagarden.net/wiki/Machamp_(Pokémon)
Mach Punch - https://bulbapedia.bulbagarden.net/wiki/Mach_Punch_(move)
Nincada - https://bulbapedia.bulbagarden.net/wiki/Nincada_(Pokémon)
Overheat - https://bulbapedia.bulbagarden.net/wiki/Overheat_(move)
PersimBerry - https://bulbapedia.bulbagarden.net/wiki/Persim_Berry
Petalburg Woods - https://bulbapedia.bulbagarden.net/wiki/Petalburg_Woods
Poke ball - https://bulbapedia.bulbagarden.net/wiki/Poké_Ball
Poochyena - https://bulbapedia.bulbagarden.net/wiki/Poochyena_(Pokémon)
PP - https://bulbapedia.bulbagarden.net/wiki/PP
Ranger - https://bulbapedia.bulbagarden.net/wiki/Pokémon_Ranger_(Ranger_series)
Run Away - https://bulbapedia.bulbagarden.net/wiki/Run_Away_(Ability)
Rustboro City - https://bulbapedia.bulbagarden.net/wiki/Rustboro_City
Sand Attack - https://bulbapedia.bulbagarden.net/wiki/Sand_Attack_(move)
Scratch - https://bulbapedia.bulbagarden.net/wiki/Scratch_(move)
Seviper - https://bulbapedia.bulbagarden.net/wiki/Seviper_(Pokémon)
Silk Scarf - https://bulbapedia.bulbagarden.net/wiki/Silk_Scarf
Slateport City - https://bulbapedia.bulbagarden.net/wiki/Slateport_City
Supersonic - https://bulbapedia.bulbagarden.net/wiki/Supersonic_(move)
Swellow - https://bulbapedia.bulbagarden.net/wiki/Swellow_(Pokémon)
Tackle - https://bulbapedia.bulbagarden.net/wiki/Tackle_(move)
Trainer - https://bulbapedia.bulbagarden.net/wiki/Pokémon_Trainer
Uproar - https://bulbapedia.bulbagarden.net/wiki/Uproar_(move)
Vigoroth - https://bulbapedia.bulbagarden.net/wiki/Vigoroth_(Pokémon)
Zigzagoon - https://bulbapedia.bulbagarden.net/wiki/Zigzagoon_(Pokémon)
Zubat - https://bulbapedia.bulbagarden.net/wiki/Zubat_(Pokémon)