7 down sounds like something Team Magma would say. Dunno if it was Maxie himself or someone else in the team. Maxie fits though, lengthwise. Is it 'Maxie' ?
5 down... the first part does not ring a bell at all. Writing a novel though... 'challenger' makes me think E4... or potentially a gym leader, but someone came to mind already and it actually fits... is it 'Shauntal', Unova's Ghost E4 ?
None of the others are ringing any bells atm.
Correct on both. Would not have chosen anyone else on Team Magma, also. Considers the admins a little obscure.
Referred to N in Shauntal's quote, by the way. Could not put N in this crossword for obvious reasons.
Reminds me either of Burgh or Bugsy; but I think Burgh was artist. So is it Bugsy from Johto ?
Correct. Says this in all the Johto games (albeit with "Bug Pokemon" rather than "Bug-type Pokemon" in the earlier ones). Never appears outside the gym in Gold/Silver/Crystal.
Filled in the current answers and deleted the solved clues.
Theme: Quotes
Grabbed quotes from a bunch of characters. Asks you to identify the character that said the line(s). Consists entirely of major characters, so do not worry about it being the third trainer on Route 2 in Galar. Speaks these lines in-game, with one exception. Will not call these lines their most famous ones. Hopefully tells you enough about their character to guess.
One note: Please do not enter the quotes into a search engine. Solves it pretty effortlessly by doing that. Feel free to search specific characters and use other tools. Just do not search for the quote directly.
ACROSS
4. "You lost to an ordinary Trainer! There is such a thing as being too stupid! Add it up, and you are nothing more than a warped, defective boy who knows nothing but Pokémon..."
12. "As I've been traveling lately, I've been thinking about things. Things like what I can do with my life, and what I want to do, but... I'm thinking how cool it would be to be a model like Elesa."
14. "Will you look at that, a pint-size challenger! Hahaha! You've got big and brassy nerves to take me on with your puny power! A Pokémon battle is war! I'll show you, civilian!"
DOWN
1. "We have a proud tradition of failure to uphold!"
6. "You're lookin' a bit gobsmacked by all this. You must be from some small country town, is that it? I'm quite the same myself."
10. "If I discover something really huge, then maybe even Gran'll admit I've got some talent!"