I somehow don't see that coming because of Satoshi's Lapras :D
It's not really writers' policy to give main characters same Pokémon :D (Yeah I know about Cyndaquil but that had a reason :D Ice-Fire combo had to be done =D)
Also May's Venusaur before it evolved, Dawn and Ash both have Quilava (Could have been any fire type), Many of Ash's rivals have had Steelix.
I don't think the writer's care who has had what at this point. Given that they don't base things arounds stats that much, it depends how they wanna use it and how they make the personality. (Iris could get a super aggressive Lapras for example)