Okay, let's answer these!
1. MC's effectiveness is usually up for debate, he comes up with pretty bizarre plans at times but can generally get things done in the end through sheer determination.
2. MC actually respects Mew a lot for her childishness, for someone as old as her to still see the world with wonder and amazement is really impressive to MC, they also bond over their love for Mewtwo.
3. Yep, that's exactly what I was going for!
4. Ho-Oh tries to have mom-talks but Lugia doesn't actually pay much attention to the Kanto Birds, she's normally too busy with the AWC to focus on anything else, Ho-Oh is considering adopting the Birds.
5. MC will think he's ready for anything, especially after capturing some actual GODS like the Sinnoh or Kalos Legends! Eternatus will still take him by surprise.
I've done Regigigas, Manaphy, Shaymin, and the lake Trio (with their matching Humans) so far
Currently working on Darkrai.