You can, but only underwater.

I wish I had a tame dinosaur.

You receive a tame dinosaur, but no one else knows it's tame, so a concerned citizen reports your dinosaur. He's considered a general safety hazard to the public and is thus taken away from you.

I wish I got a hippopotamus for Christmas.

You get a hippopotamus for Christmas. But since it cost so much to get and ship to you, it is the only thing you get, and you soon run out of money to take care of it and have to sell it online to a voilent animal gang

I wish I could spell better.

You are now champion of the National Spelling Bee, the winning word being "deoxyribonucleic". Of course, due to your new ultra nerd status at school, you will have to sit at the dork table and hang with the kid who still has glasses from the 80s. And possibly mix plaids with stripes.

I wish I had a million dollars.

You have been awarded a million dollars in back pay but find there is a tax bill of 750,000, and you have charities knocking on your door, so you end up with only $20,000 which you feel obliged to pay off student loan and family debt with.

I wish my feet were a better shape.

Your feet are a better shape, but they are too tiny for your body and you keep falling over.

I wish I had a big, beautiful library in my house.

Congratulations, you do have the wonderful library you dreamed about. But thousands of books takes up most of your living space, even though built-in bookshelves everywhere save housepainting. People keep borrowing your favourite books and not returning them on time or even at all, the books you kept for reference really need updating every so often, and there is not enough room to eat, sleep, wash or entertain. The worst of it is that your house insurance company won't pay up to replace all your books when the house burns down, because they say so many crumbling, out-of-print books in one place are a fire hazard and irreplaceable, anyway.

I wish I have a happy and contented retirement with my family.

you can only lift that much whilst in the gym, but not outside of it.

I wish I lived in Ireland

You live in Ireland. But so does everyone else on Earth and none of you can leave, so it gets rather uncomfortable.

I wish I had shape shifting powers.

You have shapeshifting powers, but you have no control over them so you spontaneously shapeshift into random things at the worst of times...

I wish I could go on a quest in real life

You are charged with finding a certain golden goblet that is an heirloom of one of the nobles houses of France. Along the way, you are sure to find peril, adventure and adrenaline!

Of course, this isn't a movie, so when you are in the jungles of Brazil, swatting bloodthirsty mosquitoes and jumping when snakes slither across your path, the hours and hours of hot hiking and steamy air are not much fun. That and the fact that you've got that weird spider bite on your shoulder... Oh, and those blisters on your heels and you've started talking to youself since you've been alone so long. Yeah! This is great!

I wish my uncle would like me for a change.

Your uncle likes you and now he wont leave you alone. He follows you everywhere you go and annoys you.

I wish i wouldn't have to go to work.

Your wish is my command! Unfortunately, I can't alter the inevitable repercussions of you losing your job, going broke, and thus becoming a homeless person with no money or friends.

I wish I was not such an insomniac at the moment.

You aren't an insomniac at the moment, but in five seconds you will be back to being an insomniac.

I wish I could be the best video game player ever.

You are the best video game player ever, but only because you've literally spent every second of your life playing video games and now you're an old man with no friends or job or anything because they're all gone. And you can never stop playing video games!!

I wish I could teleport.