BlackShark

Use PKHeX.

Run the last 2 lines again. I thought you could just run all 4 together but seems like I was wrong.

Use this command in the batch editor, it should fix all affected Pokemon. =RibbonCountMemoryContest=0 .HasContestMemoryRibbon=0 =RibbonCountMemoryBattle=0 .HasBattleMemoryRibbon=0

From all games: https://bulbapedia.bulbagarden.net/wiki/Pokémon_Egg#Appearance

Pokesav for HGSS was never really finished. The option is probably disabled because the feature was planned but never actually done. Nowadays you really should use PKHeX instead. If something can not be edited in PKHeX or one of its various plugins, it's likely that no one has figured out how to do it.

PKHeX does not support ROM hacks, only the official games. If you want to modify a hack you have to ask the author of the hack if there's any way to do it.

Oh I thought you were asking for ORAS because that commit specifically added the Pokeblocks for ORAS. For Gen 3 they have no editor.

Untick "Search Within Boxes". Unfortunately the settings are not save so you have to do this everytime you use the database.

The Mew is ok, PKHeX just doesn't recognize it. This is an issue with many event Pokemon from Gen 1/2 and even Gen 3. We would need a serialized format with all the relevant data of all of them to get that fixed. https://github.com/projectpokemon/EventsGallery/issues/261 Until then, if you trust the source, just ignore the message.

Follow this:

They can be shiny, yes.

In Gen 3 PID, IVs, nature and gender are related to eachother. If you change any of those values you have to calculate a valid PID for them, PKHeX won't do that for you.

Not an issue with PKHeX, contact the author of the Bulk Importer Plugin. It needs to be updated for the latest PKHeX.

You can't, PokeMMO is not supported, PKHeX only supports official games. No ROM hacks, no fan games.