I was randomly look around for the once while my Gameboy was about to die. While I was doing that I encountered them a few time, and brought them down to Red Zone and put them to sleep.
And then the awesome happened.
I encountered Raikou again. Now, seeing as my DS was going to die any second, I didn't care weather I caught it or not. So, being funny, I through a Friend Ball, even saying 'BE MY FRIEND, RAIKOU'. Then turning to my friend, just waiting for Raikou to break out and run away, I spoke to him for a few second. Then I look back at my game, and...
'*Click!* Raikou was Caught!'
I spazzed, and saved because my battery was almost dead. XD;
As for Entei I was randomly throwing balls, and threw a great ball. Again, I said something lulzy ('YOU'RE GREAT ENTEI, SO GET IN THE GREAT BALL SO YOU CAN BE GREAT') and spoke to my sister. Next thing I knew I caught Entei. |D