What are all the gym leaders whose highest level Pokemon* was introduced in an earlier generation than that gym leader?

Question

Please do not include game remakes like ORAS.

If there are any, please list them all. The only one I can think of now is Juan.
*on their gym team. I know weird stuff happens on rematch teams.

Comments

I could tell it was you asking this question before I even opened it XD

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yeah. I kinda like asking silly questions. You should see what I do  in class.

Answer 1

Just a little note, I will not be counting remakes.

Red, Blue, and Yellow
Gym Leaders:
None

Elite Four:
None

Source
Source2

Gold, Silver, and Crystal:
Gym Leaders:
Falkner's Pidgeotto
Bugsy's Scyther
Morty's Gengar
Chuck's Poliwrath
Brok's Onix
Misty's Starmie
Lt. Surge's Electabuzz
Janine's Venomoth
Sabrina's Alakazam
Blaine's Rapidash
Blue's Arcanine, Gyrados, and Exeggcutor (Because they are all the same level.)

Elite Four:
Bruno's Machamp
Lance's Dragonite

Source
Source2

Ruby & Sapphire:
Gym Leaders:
Watton's Magneton

Elite Four:
None

Source

Emerald:
Gym Leaders:
Juan's Kingdra

Elite Four:
None

Source

Diamond, Pearl, and Platinum :
Gym Leaders:
None

Elite Four:
None

Source
Source2

Black & White:
Gym Leaders:
None

Elite Four:
None

Source

Black2 & White2:
Gym Leaders:
None

Elite Four:
None

Source

X & Y
Gym Leaders:
None

Elite Four:
Diantha's Gardevoir

Source

Hope this helps!

Comments

I thought you said you wouldn't be counting remakes, so please delete ORAS info.

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I said that I would not be counting remakes as the same Generation, but now I realize that adding the remakes was a little stupid :P

Answer 2

1st Gen - None because it was the first generation.

2nd Gen - Gym Leader Falkner (Pidgeotto), Gym Leader Bugsy (Scyther), Gym Leader Morty (Gengar), Gym Leader Chuck (Poliwrath), Gym Leader Lt. Surge (Electabuzz), Gym Leader Sabrina (Alakazam), Gym Leader Erika (Victreebel), Gym Leader Janine (Venomoth), Gym Leader Brock (Onix), Gym Leader Blaine (Rapidash),
Gym Leader Blue (Gyarados, Exeggutor & Arcanine)

3rd Gen - Gym Leader Wattson (Magneton)

4th Gen - [Heartgold] None because it is a remake of gold and silver
[Diamond, Pearl & Platinum] None

5th Gen - [Black & White] None
[Black & White 2] None

6th Gen - [X & Y] None
[ORAS] None because it is a remake of ruby and sapphire

Sources - All serebii pages on gym leaders.
My knowledge/ memory as in what gen they were introduced.

Comments

That took a while...

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the gym leaders in the remakes didn't count, because the gym leaders were introduced in the same generation as their Pokemon. otherwise, good answer.

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There we go... Happy?

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in ruby and sapphire watson magnaton as his highest level pokemon.

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Diantha has a gardevoir in x and y