Fun Links
Favorite Pokemon pickers, personality quizzes, and other fun things

Fave Pokemon Picker 1
Pick your favorite Pokemon via elimination

Fave Pokemon Picker 2
Pick your favorite Pokemon by type and generation

Shiny Rating
Rate shiny Pokemon and see other people's comments on them

PMD Quiz
Take a personality quiz like in PMD

Pokedoku
A daily Pokemon naming puzzle

Explorers of Sky
Exactly what it says, play in browser

Pokemon Amie Dollmaker
A very cute Pokemon Amie customization replica

Pokemon Pack Sim
Pokemon TCG pack opening simulator

Pokedle
Daily guess a Pokemon

Pokecharms Trainer Card Maker
A customized trainer card maker
General Resources
Sprites repositories, team builders, and other resources for general Pokemon related things

PMD Sprite Repository
Sprites for Pokemon Mystery Dungeon games, free to use for fangames/romhacks

Pokemon Box Sprites
Database of Pokemon box sprites up to Gen 8, including shiny variants

Pokemon Ipsum Generator
Pokemon-themed lorem ipsum generator

Shiny Hunt Tracker
Counter tool and shiny hunt tracker, also has an app

Pokemon Team Planner
Team planner with stats on type coverage
Main Game Resources
These are links that are relevant to the main series Pokemon games

SV Full Odds Recipes
Sandwich recipes for shiny hunting at full odds

SV Sandwich Simulator
Test sandwich recipes to know their effects

Tera Raid Counters
Gives best counter Pokemon for tera raids

Herba Mystica Drops
Easy to browse list of which Pokemon drop which herba mystica

Voltorb Flip Solver
Imperfect solver for HGSS's Voltorb Flip minigame
Other
General useful or fun Pokemon websites that I don't know where else to sort/haven't sorted yet

Dragonfly Cave
A general pokemon fansite with lots of information, guides, and more

Pokemon Showdown
A battle simulation website with a built-in team builder

Serebii
Pokemon fansite with a ton of up to date news and information about the anime and games

Pokemon Database
Pokemon fansite with lots of game-focused information (Pokemon moves/game mechanics/etc)