More can be called in as the amiibo levels up.
Unlike with most games' amiibo features, only these exact figures are compatible (not other figures or cards of the same characters). For example, Luigi from the Super Smash Bros. series doesn't work; only Luigi from the Super Mario series does.
Source: Mon Amiibo / Thanks: memoryman3
After the Pikmin figure has been scanned and collected, scan it again to make other amiibo figures appear without needing to scan them.
Thanks: Alex Oatley