Delta Reduction is a nice attack, comboed with some healing thing Meganium could last quite a while, Mega Impact on the other hand, isn't as Mega as it sounds for a Stage 2 and is very disapointing. (just realised Mega(nium) pun.. :p)
Evo call is a very situational power, remember it only works when Meganium COMES INTO PLAY and very often there will be times when deck thinning isnt such a good idea or a Pokemon is not necessary/ a good idea to play. However it can take Holons Pokemon, which can quickly pay of its Energy requirements if comboed with the UF version. Why not try a Cessation Crystal or Energy Root to really tick your opponent off when this card is out?
On the upside, it has pretty good stats!
Eitherway I find the UF version (bouncy move) is a much better candidate or better still, its ex version. However this card should still be considered for a Meg deck for the added type advantage.
6.5/10