[Naix]

XAkaviri, for your Platinum Scramble, I give you Generator the Magnemite. Unlike other Electric-types, Generator's Electric-type moves have to be "charged up" before they can be used. You see, the way it works is that Generator's electrical power runs off a "generator" system, starting at 0 and increasing or decreasing depending on what it does/what happens to it in battle, hence the nickname. The way the generator system works is as follows:

Starts at 0.
Increases by 5 every turn Generator's in battle, counted at the end of the turn. This is doubled if there's another Electric-type on the field. (This does not mean Generator's electric power increases every turn when you're trying to catch it.)
Decreases by a varying amount when using an Electric-type attack. For damaging Electric-type moves (outside of Charge Beam), the amount decreases by the base power of said attack. If using Thunder Wave, the amount is decreased by 10. If using Charge Beam, the amount decreases normally if nothing happens, but decreases by only 20 if Generator gets the Special Attack boost.
Increases by 25 if hit by an opponent's Electric-type attack.
Decreases by 50 if healed at a Pokemon Center.
Falls to 0 if deposited in the PC.
Caps at 100 as a Magnemite, at 175 as a Magneton, and at 255 as a Magnezone.
All increases (but not decreases) are doubled if Generator is holding a Magnet.

To evolve, Generator has to fill out its "generator" (this applies for both evolutions), and if you want to teach it Charge Beam, it has to solo 2 Gym Leaders, each without the use of more than 5 items.

Have fun!