My Mom's 2012 i MiEV got these exact lights on a few days ago, and then again today.
The RBS is regenerative braking system. The turtle (which was on earlier) is the creep mode when the battery is super low. She also had the shifter D light blinking slowly, which COULD mean to have the transmission checked.
A lot of different issues, and it seems to NOT happen in reverse. The battery was full the first time it happened, so I wondered if the regen just wasn't able to put power into the battery (cuz' it's full), but now the charge is down a bit. The second time it happened (with the turtle, too) was after a downpour.
This was formerly my brother's car, and he apparently had to have some electrical connections cleaned - they were corroded. So, we will be taking it to the dealer to have it checked out. And we will look at the 12v battery, because that is still original.