Okay I am going by PokemonDb Bans. No there is no limit into using eviolite. These guys are banned however due to being overpowered with eviolite Scyther, Sneasel, Aron, Murkrow, Yanma, Misdreavus, Carvhanna, Gligar, Meditite, Ferroseed, Scraggy, and Tangela. Also berry juice is also banned. Fixed damage moves are also banned.