1,294
(1,000)

SpongeBob's Truth or Square

There are 43 SpongeBob's Truth or Square achievements worth 1,294 (1,000)

6,828 tracked gamers have this game, 2,938 have completed it (43.03%)

A Life in a Day64 (50)

Collect 99 Lives.

• Unlocked by 4,100 tracked gamers (60% - TA Ratio = 1.28) 6,830

Achievement Guide for A Life in a Day

Solution
The last level gives you around 30 live every time you beat it. So you will on have to do it at least for times but you get lives in it so it should only take you 3.
Ok, so allow me to fully clarify this for everybody.

You can replay the last level a few times to help get this, as you get something like 20-30 extra lives after beating the last boss (I dunno the exact amount), but the achievement WON'T unlock if you reach 99 lives this way.

You MUST collect an extra life token in order for the game to officially register your 99 lives.

I reached 99 lives after doing the last level for the 4th time, and didn't get the achievement until I died while replaying the first level and gained an extra life afterwards (as commented by Efford on one of the other solutions).

Whilst I realise this has already been pointed out, the purpose of writing this solution is to make easily, and instantly, noted to anyone who has encountered the same issue.

I hope this clears up everything.

DMG