gave birth to mew2 thing was that they took a gene from mew and cloned it, making another mew. but something went wrong and thus making it look different. then they wanted to change him even more and it became the fierce mewtwo. what they meant was that the genes of mew made mewtwo.
2.Jessie of team rocket had a mom who also was a part of the team. but she died so she was never seen again.
3. I'm not sure but after what I have heard this is not completely confirmed. they might be although it is not 100% confirmed. this is just what I've heard though.
4. In Brawly's gym (3rd gen) when you're inside the gym, you can talk to the wall. just go behind the right gym statue and up to the wall. then you press A and it will tell you something.
5. This is just to confirm that the glitch doesn't work anymore and to reward them for trying it. also this is the only place to get it before the E4.