Experience calculations?

[mr_pikachu]

I'm currently doing some extensive level-up training for Pokedex completion, and I had a thought about the Secret Base system in Emerald. I'm well aware that you can battle friends who have swapped records with you, and that they will be located in their own Secret Base. Further, I have Ruby, Sapphire, and Emerald carts, as well as two GBA systems. Therefore, I can swap records between the three games at will. The battles with my counterparts in the other game have tended to give much more experience than any others I can find; however, they are rather slow matches when I'm trying to maximize the experience given to low-level party members (what with having them in every matchup, having to switch back out so they won't be crushed, etc).

With all the time I've spent with that, I was wondering if there might be a better method. So I'm curious as to how the total awarded experience points are calculated. (I'm already aware of how the total is divided; I just want to know how that first number is determined.) For instance, would it be good to boost a bunch of Magikarp to Level 100 Gyarados with nothing but Splash? Or does the moveset play a factor in the calculations? And what about species, IVs, EVs, hold items, abilities, and so on? What effects do they have on the awarded experience? If anyone happens to know this, an answer would be greatly appreciated. Thanks in advance.

[Poryhedron]

EXP earned (the original number before division) is calculated solely based on opponents' species and level, and then multiplied by 1.5 if the opponent is owned by a Trainer. For proof that moveset doesn't affect it, find a place where you can encounter wild Ditto. Assuming you face Ditto of the same level, the EXP will be the same whether or not you give it a chance to Transform.

[aragornbird]

Also, all Pokemon require a certain number of EXP in order to reach Lv. 100, some needing more than others.

EXP needed for Lv. 100
Fluctuating: 1,640,000 EXP
Slow: 1,250,000 EXP
Medium Slow: 1,059,860 EXP
Medium Fast: 1,000,000 EXP
Erratic: 600,000 EXP

Most Pokemon fall in the Medium categories. All Starters are Medium Slow (regardless of their evolutionary stage) and all Legendaries are Slow.

Also, Chansey/Blissey give the most EXP out of any Pokemon, so fighting a team of six in the Secret Base will give you a ton of EXP. And they are easy to kill too as long as you have physical attacks.

[mr_pikachu]

Ah, thank you both! I appreciate the insights!

Something tells me I'm going to be training up some Blisseys in the near future...