I'm bringing back old and probably forgotten suggestions since I know bumping them all in comments probably won't do anything and just listing them here just makes it easier to find.
Suggestion: In the locations on a fossil Pokemon's page, add a link to the page for the fossil that it's revived from
Suggestion: Don't include new Pokemon or new type changes in old coverage checker
Minor suggestion: When using the search bar to search for questions, allow them to be sorted.
Suggestion: Ask user if they want spoilers
Can you update your Pokemon Go PokeDex to Include Gen 2
Suggestion: Change the "Avoid trivial questions" rule to "Avoid questions that can easily be answered on the PokemonDB".
Suggestion: Add different background styles
Suggestion: After a new user finishes making their account, redirect them to the Rules page.
Give every user an ID code?
Comment section on news page?
Suggestion: A Night Mode
Minor Suggestion showing what contest type moves can pokemon learn
Add Sun+Moon's Elite 4/Trial Captains/Kahunas/other type trainers to the 'Notable type trainers' of the type pages
Suggestion: Make a short description appear when you drag your mouse over something
Suggestion: Change "Battle Subway" to "Rate My Team"
Suggestion: Have wall posts appear in "My Updates"
Make a "Delete all wall posts button"
Suggestion: On the "all questions" or "all answers" on a user page, have an option to order them by most votes.
Have unsubmitted questions and answers saved as drafts
Suggestion: Add pronunciation of Pokemon to their Pokedex pages
Note: Some of these have been responded by Pokemaster but in a sorta 'I'll do it later sorta way'.
I'm not trying to bash on Pokemaster just bringing these back just since they're great ideas.