I think they toned it down a bit because the Elder of Sprout Tower had a Hoothoot, so I guess they though it would have been kind of redundant to include it in his party. Even at that point, I don't think it would have been too fair since his Pidgeotto was a tough one to take down.
If it were me, I'd replace the Pidgey with a low-level Doduo, and throw in a Natu for kicks. (Remember, any Pokemon that at least shares a type w/ the Gym could qualify.) I find Spearow too overused and too overpowering for rookies, but a low-level Doduo would suit. The Natu would be the second-strongest, next to the Pidgeotto, and give it Psywave to make it easy. You know what, a Spearow would be better than the same basic rookie version of his Main Partner. (Would Murkrow be pushing it?)