Oh, trust me, it is hell to raise them. Make sure you give the Lucky Egg to your Meraruba the minute you start training it and don't ever give it another item, or I swear that you'll spend weeks before it evolves, lol. If possible, also get a traded one rather than a hatched one. XD They purposefully made this bug hard to raise, lol; mine is modest, yet more often than not it had to Nitro Charge and Bug Bite her way through battles because even with the lowered attack (base 85... so about 75 accounting the stat drop from modest nature, and its base spA is 50, so about 60 accounting from the stat raise) it'll still do a quarter more damge most of the time. I also recommend killing as many Tabunne as you can because they give lots of EXP and the extra HP is welcome (some people are of the mindset that Urgamoth should run max SpA and max Speed; I prefer to have max HP and then invest in SpA and everything else, because more HP = surviving longer in battles, and after one or two Butterfly Dance, Speed will hardly be an issue).