1.Stats: Should Hariyama get a stat boost, Evolution, Mega Evolution or nothing?
The primary early Fighting type in Hoenn, Makuhita has a massive 200+ gap to Hariyama and relatively low level of evolution at 24, where the strongest evolution is Houndoom at 500 BST. This means though Hariyama should gain a stat boost, it would be thematically inappropiate to do so. This evolution level is also too short for a middle stage, despite the size difference between two stages.
This leaves Evolution and Mega Evolution as the most important ideas. An evolution can only be about +60 BST, and a Mega Evolution would be fairly weak to work without a stat boost.
So yes, evolution first, Mega later. That's the ideal route.
2.Should Hariyama get more abilities?
Hariyama already has three good abilities, but it can get more. So potential abilities would be:
- Iron Fist
- Keen Eye
- No Guard
- Super Luck
What Hariyama needs most is a recovery move like Slack Off and Drain Punch, other options like Mach Punch are also good ideas. Full list of potential moves for Hariyama are too large to list however.
4.What additional typing Hariyama can have?
Normal, Rock, Ground and Steel are the most obvious ones. Dark is also a decent option.