Hi. I thought of some extensions that could be useful (the names could be different, of course):

• ConditionalStatNature: would print the stat nature only if it's different from original nature, empty string otherwise. The printed string could be something like "➔Adamant" or "(Adamant)"
• ConditionalGender: would print "♀" or "(Female)" if female, "♂" or "(Male)" if male and an empty string if genderless. Maybe leave an empty string anyway if Nidoran, which already has the gender symbol in the name.
• ConditionalNickname: would print the nickname inside parentheses or quotes if the pokémon is nicknamed, empty string otherwise. I know {Nickname} already defaults to the species name if the pokémon isn't nicknamed, but if the pokémon is in a different language it will print the species name in that language, while {(Species)Species} always prints it in English. So it could be useful to be able to do {(Species)Species} {ConditionalNickname} instead.
• The Scale property could show the HeighScalar for pk8, pb8 and pb7, since this property didn't exist until Legeds Arceus and it gets its value copied from HeightScalar anyway when the mon is transfered to newer games. Alternatively, there could be a new extension (ConditionalScale or something) that takes Scale if available, HeightScalar as a second option and an empty string for pre-Switch saves.