Since W.Ephraim will be easier to speculate stats

So off the back we know he has 45 hp and 40/41 atk (16 Mt weapon bring it up to 56/57), and going off of his other versions who have middling spd and res and good def, I'm going to take a guess and say his base def will be around 35-40, since he already has Bold Fighter he might not have too high of spd probably low 20's, I think he might actually have somewhat good res maybe high 20's low 30's depending on what they put his def at

45/40(41)/23/38/31(30) for 177 bst
Edit: tho since we are in Gen 3 now it wouldn't surprise me if he had around 179 bst so probably adding +1 to Def/Res