Hello there, and foremost, I'm sorry for the inconvenience;
Did you look up for the Adamant Orb in all these following spots?
Furthermore, you will have to talk to Dawn at Sandgem Town to choose which Lake Guardian you want, for it in order to respawn for you to get a shot at catching it, since you had to fight them to get their seen data :Angel:
Please have a check and tell me how it goes; in the meanwhile, I wish you a good day, and happy new year!
yey i got my mesprit now .. thanks calahan!! your the best!!