Those are some nice cards.
Let's start with Manectric. Manectric has no Poke Power, nor a Poke Body, which I consider a disadvantage. He is a stage one with 80HP (not bad), with an attack that could potentionally save you from a powerful Pokemon that is out, Kick Away. Strong Current is one energy more than I think it should be (I don't know why, I just think so.)
Jigglypiff and Wigglytuff had always been one of my favourites, so I am slightly bias ;). Fluffy Fur is a good way to go out, makingyour opponent have a Special Condition as to remember Wigglytuff by. Collect could possibly can turn a match around, you getting the cards you need at the right tim. Also, Pester is slightly weak. However, it makes up for it in the text 'affected by a Special Condition, this attack foes 30 damage plus 20 more damage.' That ain't bad nessercarily.