It's pretty easy...but it isn't something to get into as much as the toy car. I think the Parrot in the US version was, like 1/5 the friggin' puzzles in this game, changed. I believe it was due to the involvement of Japanese vocabulary on them.
I figured out how to beat the Parrot Delivery #3 "A Flower For Adeline".
First draw a line conecting the longest dots on the bottom (above the 2 dots on the very bottom). Then draw a line on the 2 dots below the "I" shaped wall right above it. Then draw a line on the 2 dots next to the "/" shaped wall. Hit start and the parrot will deliver the Flower. --- Toho's Godzilla Will Live Forever! Soul Silver FC: 5156 5772 6549