Rephrasing that, "apparently" occurs with trades within the generation as well. As I'm currently at inner Castelia City, I can't check my PC Cobalion/Terrakion/Virizion right now, but going back to Black and checking a Treecko I have there, it notes "Egg apparently hatched". It was hatched on Route 3 from the Day-Care couple's Egg in a breeding scenario, egg received 12/20/2012 (this person apparently plays with the date somewhat ahead).
Then there are Keldeo, Meloetta, and Genesect, who "apparently had a fateful encounter at Lv.15".
Let's go to non-Events. Tornadus for me says "Met at Lv.40" as I caught it on Route 5 thanks to an incredibly useful (at the time) Watchog; I tell you, Watchog is a great Legendary trapper on roamers based on that one experience. Thundurus, however, says for me "apparently met at Lv.40" and caught at Route 4; this info is where you determine legitimacy, as within the generation this number should NOT change. If I trade you my Tornadus, it would again say "Apparently caught".
In other words, ANY Pokémon imported or traded will say "apparently" because you cannot possibly know, you weren't there to watch it be caught or hatch. Only your own catches and non-Events will not use the "A" word.
Then there are Keldeo, Meloetta, and Genesect, who "apparently had a fateful encounter at Lv.15".
Let's go to non-Events. Tornadus for me says "Met at Lv.40" as I caught it on Route 5 thanks to an incredibly useful (at the time) Watchog; I tell you, Watchog is a great Legendary trapper on roamers based on that one experience. Thundurus, however, says for me "apparently met at Lv.40" and caught at Route 4; this info is where you determine legitimacy, as within the generation this number should NOT change. If I trade you my Tornadus, it would again say "Apparently caught".
In other words, ANY Pokémon imported or traded will say "apparently" because you cannot possibly know, you weren't there to watch it be caught or hatch. Only your own catches and non-Events will not use the "A" word.