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« on: June 14, 2018, 05:57:13 pm »
IVs and EVs are both numbers that affect your pokemon's stats.
IVs are hidden values that are inherent to each individual monster, and cannot really be changed except for certain very rare items (and even then only in later games). Having one or more stats with max IVs can turn a merely average pokemon into something more powerful.
EVs start at 0 in each stat with a freshly-caught/freshly-hatched pokemon. These values increase when a pokemon earns experience, based on what type of pokemon they earn experience from. Each pokemon can only earn so many EVs, and each stat has a certain cap, so it's impossible to max out all EVs no matter how much a pokemon battles. This, by the way, is where the rumor about rare candies resulting in worse stats came from; if you glitch yourself infinite rare candies and raise your monsters to max level right away, they will lack the EVs that a more honest player would earn, and thus have worse stats.
EVs were once hidden in much the same way as IVs, but more recent games offer ways to see your pokemon's EVs and even train them outside of battle.
Basically, unless you want to get competitive you can almost always ignore IVs. Figuring out which IVs each pokemon has is a somewhat painful process with a great deal of uncertainty built in (you basically get different messages based solely on how many max IVs you have, and little else). Since you're playing OR (good choice) you have access to Super Training for easy access to EVs.